Ragasa, Consolacion Y.
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PERSONAL INFORMATION
PRESENT AFFILIATION
FIELD OF EXPERTISE
EDUCATION
EMPLOYMENT
TRAININGS
RESEARCHES
AWARDS
PAPER PRESENTED
PUBLICATIONS
ASSOCIATION

  
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 PERSONAL INFORMATION
Birth Place Birth Date Civil Status Gender Tel. No. Address
Sinait, Ilocos Sur August 28, 1955 Single Female 632-9950213 34 Malvar St., Project 4, Quezon City  
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 PRESENT AFFILIATION    
 
Position Office Address TelNo. FaxNo. Email.
Full Professor 10 Chemistry Department, De La Salle University 2401 Taft Ave., Manila, 1004 Philippines 632-5360230 - ragasac@dlsu.edu.ph
 
         
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 FIELD/s OF EXPERTISE  
Chemistry // Natural Products Chemistry
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 EDUCATION    
University Address Degree Date Finished
University of the Philippines (UP) Diliman, Quezon City Ph. D. in Chemistry 1990
UP Diliman, Quezon City M. S. Chemistry 1983
UP Diliman, Quezon City B. S. Chemistry 1977
 
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 PREVIOUS EMPLOYMENT    
 
Institution Position From To
Philippine Council for Health Research and Development (PCHRD) Science Research Specialist IV 1982-1983 -
Department of Science and Technology Planning Officer 2 1980-1981 -
UP-NSRI Science Research Associate 2 1978-1979 -
 
         
TOP
 TRAININGS    
 
Course Place From To
A New Diterpene from Caesalpinia pulcherrima 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City 2004 My 24-26 -
Antimicrobial Compounds from Pithecolobium dulce 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City 2004 My 24-26 -
Polyprenols from Jatropha curcas L. With Unusual Ions In Electrospray Ionisation Mass Spectroscopy 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City 2004 My 24-26 -
 
         
TOP
 RESEARCHES  
COMPLETED
Analgesic property of secondary metabolites/extracts of medicinal plants
Anti-inflammatory activity of secondary metabolites/extracts of medicinal plants
Antimicrobial activities of secondary metabolites/extracts of medicinal plants
Hypoglycemic activity of secondary metabolites/extracts of Philippine medicinal plants
 
ONGOING
Isolation, structure elucidation, and Bbioassay of secondary metabolites from endemic Philippine trees
Screening for new and antimicrobial compounds frrom plants of the Family Asteraceae/Compositae
 
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 AWARDS/ RECOGNITION RECEIVED  
 
Award Name Awarding Body Date Awarded
Achievement Award in Chemical Research National Research Council of the Philippines 2003
Achievement Award in Chemical Research Philippine Federation of Chemistry Societies 2002
St. Miguel Febres Cordero Research Award 2000-2001
Memorial Award for Outstanding Teacher Kyu Yek Chiong & Tan Chun Tee 1997
FSC Distinguished Professorial Chair in Chemistry Bro. Lewis Parrot 1999-2007
Distinguished Professorial Chair in Chemistry Angel Arguelles 1998-1999
Academic Chair Angel Arguelles 1997-1998
Academic Chair Don Jose Cojuangco 1991-1997
Promotion of Science Fellow Japan Society 1992 Ap-Mr
Consortium Ph.D. Fellow UP-ADMU-DLSU 1984-1988
Research Grant Australian Universities International Development Program (AUIDP) 1987 Je-D
   
         
TOP
 PAPERS PRESENTED  
Antimicrobial Compounds from Pithecolobium dulce
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel,Iloilo City , 2004 My 24-26
Secondary Metabolites from Stenolobium stans
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Terpenoids from Centella asiatica
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 11-13 April 2005
Antimutagenicity Potential of Some Oral Contraceptives
Ragasa, C.Y., KKP Convention, Currimao, Batac, Ilocos Norte , 1984 My
Sesquiterpene Lactones from Wedelia prostata and Pseudoelephantopus spicatus
Ragasa, C.Y., 4th Philippine Chemistry Congress, Tacloban, Leyte , 1988 My
Sesquiterpene Lactones from Wedelia prostata
Ragasa, C.Y., ASOMPS V, Bandung, Indonesia , 1989 Ja
A Novel Diterpene from Bidens pilosa
Ragasa, C.Y., 10th Philippine Chemistry Congress, DAP, Tagaytay City , 1994 My
Antimutagenicity Potential of Some Isolates from Three Philippine Medicinal Plants
Ragasa, C.Y., 10th Philippine Chemistry Congress, DAP, Tagaytay City , 1994 My
Antimutagens from Elephantopus scaber
Ragasa, C.Y., 10th Philippine Chemistry Congress, DAP, Tagaytay City , 1994 My
Antimutagenic Diterpenes from Andrographis paniculata
Ragasa, C.Y., Malaysian Chemical Congress, Sarawak, Malaysia , 1995
Novel Terpenes from Some Medicinal Plants
Ragasa, C.Y., 4th Clara Y. Lim-Sylianco Lecture Series, UST, Manila , 1995
A Bioactive Chromene from Eupatorium toppingianum
Ragasa, C.Y., 11th Philippine Chemistry Congress and Asian Chemistry Congress, Philippine Village Hotel, Manila , 1995 My
A Novel Tetranortriterpenoid from Azadirachta indica
Ragasa, C.Y., 11th Philippine Chemistry Congress and Asian Chemistry Congress, Philippine Village Hotel, Manila , 1995 My
Novel Monoterpene Glycosides from Erigeron linifolius
Ragasa, C.Y., 11th Philippine Chemistry Congress Asian Chemistry Congress, Philippine Village Hotel, Manila , 1995 My
Diterpenes from Andrographis paniculata
Ragasa, C.Y., 11th Philippine Chemistry Congress and Asian Chemistry Congress, Philippine Village Hotel, Manila , 1995 My
A Bioactive Carotenoid from Mimosa invisa
Ragasa, C.Y., 1st Natural Products Convention, UST, Manila , 1996 D
New Tetranortriterpenoids from Azadirachta indica
Ragasa, C.Y., 1st Natural Products Convention, UST, Manila , 1996 D
Antimicrobial and Antimutagenic Constituents from Cosmos caudatus
Ragasa, C.Y., 1st Natural Products Convention, UST, Manila , 1996 D
Bioactive Monoterpene Glycosides from Erigeron linifolius
Ragasa, C.Y., 1st Natural Products Convention, UST, Manila , 1996 D
Furanocoumarin Derivatives and A Sesquiterpene Lactone from Ficus pumila
Ragasa, C.Y., 1st Natural Products Convention, UST, Manila , 1996 D
Sesquiterpene Glycosides from Pittosporum pentandrum
Ragasa, C.Y., 12th Philippine Chemistry Congress, Iloilo City , 1996 My
A Bioactive Triterpene from Lantana camara
Ragasa, C.Y., 12th Philippine Chemistry Congress, Iloilo City , 1996 My
Antifungal Diterpenes from Hyptis suaveolens
Ragasa, C.Y., 12th Philippine Chemistry Congress, Iloilo City , 1996 My
A Thiophene Derivative From a Chrysanthemum coronarium L
Ragasa, C.Y., Natividad, G.M., Rideout, J.A., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
Antimutagenic alkaloids from Catharanthus roseus Don
Inte, V.M., L. Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
Antifungal Flavones from Waltheria americana
Ragasa, C.Y., Cruz C., Julgado, C., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
Antimutagen and Antifungal Compounds from Cosmos caudatus
Ragasa, C.Y., Nacpil, Z.D., Penalosa, B.A., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
Bioactive furanocoumarin derivatives from Ficus pumila
Juan, B.A., Ragasa, C.Y., Rideout, J.A., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
A Bioactive Carotenoid from Mimosa invisa
Largo, G. Jr., Rideout, J.A., Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
A thiophene Derivative From a Chrysanthemum coronarium L
Ragasa, C.Y., Natividad, G.M., Rideout, J.A., 13th Philippine Chemistry Congress, Puerto Princesa City, Palawan , 1997
Novel Monoterpene Glycosides and Monoterpene Ester from Erigeron linifolius
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
A Bioactive Carotenoid from Mimosa invisa
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
Novel tetranortriterpenoids from Azadirachta indica
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
Antimicrobial and Antimutagenic Constituents of Cosmos caudatus
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
Bioactive Furanocoumarine Derivatives and A Sesquiterpene Lactone from Ficus pumila
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
Antifungal Flavones from Waltheria americana
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
A Thiophene Derivative from Chrysanthemum coronarium
Rgasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
An Antimutagenic Alkaloid from Catharanthus roseus
Ragasa, C.Y., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1997 My
Antimicrobial chromenes from Eupatorium toppinglanum
Ragasa, C.Y. Tempora, M. Rideout, J.A., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998
A bioactive dipeptide derivative from Malachra fasciata
Rideout, J.A., Penalosa, B.A., Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998
A New Diterpene from Coleus blumei
Ragasa, C.Y., Templora, V.F., Rideout, J.A., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998
A Triterpene from Ficus pumila
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998 My
Antimicrobial Chromenes from Eupatorium toppingianum
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998 My
Antifungal Compounds from Peperomia pellucida.
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic. , 1998 My
A Bioactive Diterpene Derivative from Malachra fasciata
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998 My
New Diterpenes from Coleus blumei.
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic. , 1998 My
A New Sesquiterpene Lactone from Pseudoelephantopus spicatus
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic , 1998 My
An Antimicrobial Alkaloid from Catharanthus roseus.
Ragasa, C.Y., 14th Philippine Chemistry Congress, Crown Peak, Subic. , 1998 My
A thiophene derivative from a Chrysanthemum coronarium L
Ragasa, C.Y., Natividad, G.M., Rideout, J.A., 13th Philippine Chemistry Congress, Puerto Princesa, Palawan , 1999
A Biflavone from Araucaria bidwillii
Ragasa, C.Y., International Symposium on Biologically Active Natural Products, Ateneo de Manila University, Manila , 1999 D
An Antimicrobial Flavone from Vitex parviflora
Ragasa, C.Y., International Symposium on Biologically Active Natural Products, Ateneo de Manila University, Manila , 1999 D
New Ionone Derivatives from Alternanthera sessilis.
Ragasa, C.Y., International Symposium on Biologically Active Natural Products, Ateneo de Manila University, Manila. , 1999 D
Lignans from Gliricidia sepium
Ragasa, C.Y., International Symposium on Biologically Active Natural Products, Ateneo de Manila University, Manila , 1999 D
New Diterpenes from Tinospora rumphii
Ragasa, C.Y., 3rd NPSP Annual Convention, DLSU, Manila , 1999 D
Antimicrobial Compounds from Vitex negundo
Ragasa, C.Y., 3rd NPSP Annual Convention, DLSU, Manila , 1999 D
Medicinal Phytochemistry
Ragasa, C.Y., Angel Arguelles Inaugural Professorial Lecture, Dean Rosario Jose Seminar Room , 1999 Mr
New Diterpenes from Tinospora rumphii.
Ragasa, C.Y., 15th Philippine Chemistry Congress, Cebu City. , 1999 My
An Antimicrobial and Antimutagenic Anthraquinone from Cassia alata
Ragasa, C.Y., 15th Philippine Chemistry, Congress, Cebu City , 1999 My
Antimicrobial Compounds from Vitex negundo
Ragasa, C.Y., 15th Philippine Chemistry Congress, Cebu City , 1999 My
Antimicrobial flavones from Coleus amboinicus
Ragasa, C.Y., 15th Philippine Chemistry Congress, Cebu City , 1999 My
Secondary Metabolites from Some Medicinal Plants
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture, Dean Rosario Jose Seminar Room, DLSU, Manila , 1999 N
Secondary Metabolites from Some Medicinal Plants.
Ragasa, C.Y., University of the Philippines at Los Banos , 1999 N
New and Bioactive Compounds from Some Medicinal Plants
Ragasa, C.Y., URCO Faculty Research Recognition, Ariston Estrada Seminar Room, , 2000 Mr 15
New Ionone Derivatives from Alternanthera sessilis
Ragasa, C.Y., 16th Philippine Chemistry Congress, Manila Hotel, Manila , 2000 My
Carotenoid, Sterol and Hydrocarbons from Spondias purpurea
Ragasa, C.Y., 16th Philippine Chemistry Congress, Manila Hotel, Manila , 2000 My
New Ionone Derivatives from Alternanthera sessilis.
Ragasa, C.Y., 16th Philippine Chemistry Congress, Manila Hotel, Manila , 2000 My
An Antimicrobial Flavone from Vitex parviflora
Ragasa, C.Y., 16th Philippine Chemistry Congress, Manila Hotel, Manila , 2000 My
New Ionone Derivatives from Alternanthera sessilis.
Ragsa, C.Y., Bro. Lewis Parrot Professorial Lecture, Dean Rosario Jose Seminar Room, DLSU, Manila , 20001 F
Secondary Metabolites from Some Plants of the Family Leguminosae.
Ragasa, C.Y., Professorial Chair Lecture 504 , 2001 Ag 1
New and Antimicrobial Compounds from 10 Medicinal Plants
Ragaa, C.Y., URCO Research Dissemination Seminar Conference Room C, DLSU, Manila , 2001 Ag 23
New and Antimicrobial Compounds from 10 Medicinal Plants
Ragasa, C.Y., URCO Research Dissemination Seminar Conference Room C, DLSU, Manila , 2001 Ag 23
A New Diterpene from Caesalpinia pulcherrima.
Ragasa, C.Y., 6th Natural Products Convention UST Research Center, Manila , 2001 D
An Antimicrobial Flavone Glycoside from Pithecolobium dulce
Ragasa, C.Y., 6th Natural Products Convention UST Research Center, Manila , 2001 D
A New Diterpene from Caesalpinia pulcherrima.
Ragasa, C.Y., 6th Natural Products Convention UST Research Center, Manila , 2001 D
An Antimicrobial Flavone Glycoside from Pithecolobium dulce
Ragasa, C.Y., 6th Natural Products Convention UST Research Center, Manila , 2001 D
Natural Products Research
Ragasa, C.Y., Adamson University, Manila , 2001 D 7
New Ionone Derivatives from Alternanthera sessilis
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture, Dean Rosario Jose Seminar Room, DLSU, Manila , 2001 F
New Ionone Derivatives from Alternanthera sessilis
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture, Dean Rosario Jose Seminar Room, DLSU, Manila , 2001 F
Antimicrobial Compounds from Mentha cordifolia.
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City. , 2001 My
Antimicrobial Compounds from Anacardium occidentale
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City , 2001 My
Antimicrobial Compounds from Mentha cordifolia
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City , 2001 My
Antimicrobial Compounds from Anacardium occidentale.
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City. , 2001 My
Antimicrobial Compounds from Mentha cordifolia
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City , 2001 My
Antimicrobial Compounds from Anacardium occidentale
Ragasa, C.Y., 17th Philippine Chemistry Congress Xavier Sports and Country Club, Cagayan de Oro City , 2001 My
New Diterpenes from Caesalpinia pulcherrima
Ragasa, C.Y., 18th Philippine Chemistry Congress and Asia Pacific Conference on Analytical Science EDSA, Shangrila, Hotel, Mandaluyong City , 2002 F
Antimicrobial Flavone Glycoside from Pithecolobium dulce
Ragasa, C.Y., 18th Philippine Chemistry Congress and Asia- Pacific Conference on Analytical Science, EDSA Shangri-La Hotel, Mandaluyong City , 2002 F
Antimicrobial Monoterpene from Pterocarpus indicus
Ragasa, C.Y., 18th Philippine Chemistry Congress and Asia- Pacific Conference on Analytical Science, EDSA Shangri-La Hotel, Mandaluyong City. , 2002 F
New Diterpenes from Caesalpinia pulcherrima
Ragasa, C.Y., 18th Philippine Chemistry Congress and Asia- Pacific Conference on Analytical Science, EDSA Shangri-La Hotel, Mandaluyong City , 2002 F
Antimicrobial Flavone Glycoside from Pithecolobium dulce
Ragasa, C.Y., 18th Philippine Chemistry Congress and Asia- Pacific Conference on Analytical Science, EDSA Shangri-La Hotel, Mandaluyong City , 2002 F
Isolation, Structural Elucidation and Antimicrobial Testing of Secondary Metabolites from Philippine Medicinal Plants
Ragasa, C.Y., Mapua Institute of Technology, Manila , 2002 Ja 24
New Terpenes from Ixora coccinea and Ceasalpinia pulcherrima
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture Science and Technology Research Center Seminar Room, DLSU, Manila , 2003 Mr
New Terpenes from Ixora coccinea and Ceasalpinia pulcherrima.
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture Science and Technology Research Center Seminar Room, DLSU , 2003 Mr
Antimicrobial Constituents of 12 Medicinal Plants.
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture. J 504, DLSU-Manila. , 2004 Mr 19
Antimicrobial Triterpenes from Chrysanthemum coronarium
Ragasa, C.Y., S&T Conference, Yuchengco 504, DLSU-Manila , 2004 Mr 4
New Cycloartenol Esters from Ixora coccinea.
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
A New Diterpene from Caesalpinia pulcherrima.
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
Terpenoids and Sterols from Lagerstroemia speciosa.
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
Antimicrobial Sesquiterpenoids and Diarylheptanoid from Curcuma domestica
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City , 2004 My 24-26
Polyprenols from Jatropha curcas L. With Unusual Ions In Electrospray Ionisation Mass Spectroscopy
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel, Iloilo City , 2004 My 24-26
Secondary Metabolites from Jasminum sambac and Cananga odorata.-
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
New Cycloartenol Esters from Ixora coccinea
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel, Iloilo City , 2004 My 24-26
A New Diterpene from Caesalpinia pulcherrima
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel, Iloilo City , 2004 My 24-26
Terpenoids and Sterols from Lagerstroemia speciosa
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City , 2004 My 24-26
Antimicrobial Sesquiterpenoids and Diarylheptanoid from Curcuma domestica
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
Secondary Metabolites from Jasminum sambac and Cananga odorata
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel, Iloilo City , 2004 My 24-26
Antimicrobial Compounds from Pithecolobium dulce.
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City. , 2004 My 24-26
Isolation, Structure Elucidation, and Antimicrobial Assay of Secondary Metabolites from Three Philippine Medicinal Plants
Ragasa. C.Y., Research Faculty Lecture Series. Ortigas Seminar Room , 2004 O 1
New Monoterpenes from Gardenia augusta.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club. , 2005 Ap 11-13
Antimicrobial Terpenoids from Lansium domesticum.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Secondary Metabolites from Bauhinia purpurea
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Novel Monoterpene Lactones from Nephelium lappaceum.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
New Monoterpenes from Gardenia augusta
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
Terpenoids from Tithonia diversifolia
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
Secondary Metabolites from Stenolobium stans
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
Antimicrobial Terpenoids from Lansium domesticum.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
Antimicrobial Compounds from Artocarpus heterophyllus.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club , 2005 Ap
Novel Monoterpene Lactones from Nephelium lappaceum.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Terpenoids from Tithonia diversifolia
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Antimicrobial Compounds from Artocarpus heterophyllus.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Terpenoids from Centella asiatica.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City. , 2005 Ap 11-13
Secondary Metabolites from Bauhinia purpurea.
Ragasa, C.Y., 20th Philippine Chemistry Congress, Baguio Country Club, Baguio City , 2005 Ap 11-13
Novel Monoterpenes from Nephelium lappaceum
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture. J 504, DLSU-Manila , 2005 Mr
Secondary Metabolites from Tectona philippinensis
Ragasa, C.Y., Osaka U-DLSU Conference, Yuchengco Bldg., DLSU, Manila , 2006 Ag
Secondary Metabolites from Tectona philippinensis.
Ragasa, C.Y., Osaka U-DLSU Conference Yuchengco Bldg. , 2006 Ag
An Antimicrobial Sesquiterpene Lactone from Michelia champaca.
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University , 2006 Ap
Antimicrobial Terpenoids from Tithonia diversifolia.
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University , 2006 Ap
Terpenoids and Sterol from Pteridium aquilinum.
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University , 2006 Ap
An Antimicrobial Sesquiterpene Lactone from Michelia champaca.
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University, Manila , 2006 Ap 4-7
Antimicrobial Terpenoids from Tithonia diversifolia
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University, Manila , 2006 Ap 4-7
Terpenoids and Sterol from Pteridium aquilinum
Ragasa, C.Y., 21st Philippine Chemistry Congress, Ateneo de Davao University, Davao City , 2006 Ap 4-7
New Iridoids from Gardenia augusta.
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture. J 107, DLSU-Manila , 2006 Mr
New Iridoids from Gardenia augusta.
Ragasa, C.Y., Bro. Lewis Parrot Professorial Lecture , 2006 Mr
Diterpenes from Clavularia sp.
Ragasa, C.Y., Osaka U-DLSU Conference, Yuchengco Bldg., DLSU, Manila , 2007 Ag
A Sesquiterpene Lactone from Michelia champaca.
Ragasa, C.Y., Osaka U-DLSU Conference, Yuchengco Bldg., DLSU, Manila , 2007 Ag
Terpenoids from Tithonia diversifolia.
Ragasa, C.Y., Osaka U-DLSU Conference, Yuchengco Bldg., Manila , 2007 Ag
A Sesquiterpene Lactone from Michelia champaca.
Ragasa, C.Y., Osaka U-DLSU Conference Yuchengco Bldg. , 2007 Ag
Diterpenes from Clavularia sp.
Ragasa, C.Y., Osaka U-DLSU Conference Yuchengco Bldg. , 2007 Ag
Terpenoids from Tithonia diversifolia.
Ragasa, C.Y., Osaka U-DLSU Conference Yuchengco Bldg , 2007 Ag
Secondary Metabolites from Tectona philippinensis.
Ragasa, C.Y., 22nd Philippine Chemistry Congress, DAP, Tagaytay , 2007 Ap
Anti-cancer and Antimicrobial Labdane Diterpene from Andrographis paniculata.
Ragasa, C.Y., 22nd Philippine Chemistry Congress. DAP, Tagaytay , 2007 Ap
Secondary Metabolites from Tectona philippinensis
Ragasa, C.Y., 22nd Philippine Chemistry Congress DAP, Tagaytay , 2007 Ap
Anti-cancer and Antimicrobial Labdane Diterpene from Andrographis paniculata.
Ragasa, C.Y., 22nd Philippine Chemistry Congress DAP, Tagaytay , 2007 Ap
A New Rearranged Dolabellane Diterpene from the Soft Coral Clavularia inflata.
Ragasa, C.Y., PAASE Conference, Century Park Hotel,Manila , 2007 F
A New Rearranged Dolabellane Diterpene from the Soft Coral Clavularia inflata
Ragasa, C.Y., PAASE Conference Century Park Hotel , 2007 F
New Chromomoric Acids and Other Constituents from Tectona philippinensis.
Ragasa, C.Y., Lewis Parrott, FSC Distringuished Professorial Chair in Chemistry Lecture , 2007 Mr
New Chromomoric Acids and Other Constituents from Tectona philippinensis.
Ragasa, C.Y., Lewis Parrott, FSC Distringuished Professorial Chair in Chemistry Lecture. J 504. , 2007 Mr 27
New Chromomoric Acid Derivatives from Tectona philippinensis.
Ragasa, C.Y., Eurasia Conference, PICC, Manila , 2008 Ja
A New Sesquiterpene from Artemisia vulgaris.
Ragasa, C.Y., Eurasia Conference, PICC, Manila , 2008 Ja
New Chromomoric Acid Derivatives from Tectona philippinensis.
Ragasa, C.Y., Eurasia Conference PICC , 2008 Ja
A New Sesquiterpene from Artemisia vulgaris.
Ragasa, C.Y., Eurasia Conference PICC , 2008 Ja
Secondary Metabolites from Diospyros philippinensis.
Ragasa, C.Y., 2nd PICYC. Universiti Sains Malaysia. Penang, Malaysia , 2008 Je
Antimicrobial Terpenoids from Taraxacum officinale
Ragasa, C.Y., 10th S & T Congress,DLSU , 2008 Jl
Hypoglycemic Potential of A Diterpene from Smallanthus sonchifolius.
Ragasa, C.Y., Lewis Parrott, FSC Distringuished Professorial Chair in Chemistry Lecture. J 504. , 2008 Mr 26
Triterpenes from Diospyros blancoi
Ragasa, C.Y., Osaka-DLSU Workshops,Yuchengco, DLSU , 2008 S
Polyprenols from Jatropha curcas L. With Unusual Ions In Electrospray Ionisation Mass Spectroscopy
Ragasa, C.Y., 19th Philippine Chemistry Congress, Sarabia Manor Hotel. Iloilo City , 24-26 May
 
TOP
 PUBLICATIONS  
New eudesmanolide sesquiterpenes from a Philippine collection of Wedelia prostata
Ragasa, C.Y., Journal of Natural Products , 1993, 56,3386-393
A diterpene from Bidens pilosa
Ragasa, C.Y. et al, Phytochemistry , 1995, 8,61449-1450
Antimutagens from Elephantopus scaber
Ragasa, C.Y., J. Sy, V., Agbayani, R., Infante, M., Col. J.C. , Kimika , 1995, 11,25-28
Flavanones and triterpenes from Ageratum conyzoides
Ragasa, C.Y., Agham , 1995, 19,221-25
A Bioactive Carotenoid from Mimosa invisa
Ragasa, C.Y., Philippine Journal of Science , 1997, 126,1107-115
A bioactive triterpene from Lantana camara
Barre, J.T., Bowden, B.F., Coll, J.C., De Jesus, J., De La Fuente, V., Janairo, G.C., Ragasa, C.Y., Phytochemistry , 1997, 45,2321-324
Sesquiterpene Glycosides from Pittosporum pentandrum
Ragasa, C.Y., Rideout, J.A., Coll, J.C., Tierra, D.S., Phytochemistry , 1997, 45,3545-547
Monoterpene Glycosides from Erigeron linifolius
Ragasa, C.Y., Sy, J., Coll, J.C., Inte, V.M., Rideout, J.A., Phytochemistry , 1997, 46,1151-154
Tetranortriterpenoids from Azadirachta indica
Ragasa, C.Y., Nacpil, Z.D., Natividad, G.M., Coll, J.C., Tada, M., Rideout, J.A. , Phytochemistry , 1997, 46,3555-558
A bioactive carotenoid from Mimosa invisa
Largo, G., Rideout, J.A., Ragasa, C.Y., Philippine Journal of Science , 1997, 126,1107-114
Bioactive furanocoumarin derivatives from Ficus pumila
Juan, E.A., Rideout, J.A., Ragasa, C.Y., Philippine Journal of Science , 1997, 126,2143-153
An antimutagenic monoterpene from Malachra fasciata
Ragasa, C.Y., Agbayani, V., Hernandez, R.B., Rideout, J.A. , Philippine Journal of Science , 1997, 126,2183-189
Antimutagen and antifungal compounds from Cosmos caudatus
Ragasa, C.Y., Nacpil, Z.D., Penalosa, B.A., Coll, J.C., Rideout, J.A. , Philippine Journal of Science , 1997, 126(3),199-206
Antifungal flavonoids from Waltheria americana
Ragasa, C.Y., Philippine Journal of Science , 1997, 126,3243-250
A bioactive thiophene derivative from Chrysanthemum coronarium
Ragasa, C.Y., Sy, V., Agbayani, R., Infante, M., Col. J.C. , Philippine Journal of Science , 1997, 126,4275-281
Alkaloid and saponin from Argemone mexicana
Maliwat, L., Ragasa, C.Y., Tada, M., Kimika , 1997, 13(1),7-9
Antimutagenic diterpenes from Andrographis paniculata
Nacpil, Z.D., Ragasa, C.Y., Rideout, J.A., Coll, J., Kimika , 1997, 13,111-16
A bioactive carotenoid from Mimosa invisa
Largo, G. Jr., Rideout, J.A., Ragasa, C.Y., Philippine Journal of Science , 1997, 126,1107-115
A Bioactive Dipeptide Derivative from Malachra fasciata
Ragasa, C.Y., Penalosa, B.A., Rideout, J.A., Philippine Journal of Science , 1998, 127,4267-276
Antifungal Compounds from Peperomia pellucida
Ragasa, C. Y., Dumato, M., Rideout, J.A., ACGC Chemical Research Communications , 1998, 7:,48-53
An Antimicrobial Alkaloid from Catharanthus roseus
Ragasa, C.Y., Inte, V.M., Rideout, J.A. , Manila Journal of Science , 1998, 1,219-27
An Antifungal Diterpene from Chrysanthemum coronarium
Ragasa, C.Y., Natividad, G.M., Rideout, J.A. , Kimika , 1998, 14,117-20
An Antifungal Tetranortriterpenoid from Swietenia macrophylla
Ragasa, C. Y., Daniel, R., Rideout, J.A. , Kimika , 1998, 14(1):,21-25
A Bioactive monoterpene Ester from Erigeron linifolius
Ragasa, C.Y., Sy, J., Coll, J.C., Rideout, J.A., Asia Life Sciences , 1998, 7,11-9
Triterpenes, Hydrocarbons and An Antimutagenic Alkaloid from Catharanthus roseus
Inte, V.M., Ragasa, C.Y., Rideout, J.A. , Asia Life Sciences , 1998, 7(1):,11-21
A Triterpene from Ficus pumila
Ragasa, C.Y., Juan, E.A., Rideout, J.A., Journal of Asian Natural Products Research , 1999, 1,269-275
An antimicrobial sesquiterpene lactone from Pseudoelephantopus spicatus
Ragasa, C.Y., Alea, G.V., Rideout, J.A., Manila Journal of Science , 1999, 2,227-31
Antimicrobial Compounds from Vitex negundo
Ragasa, C.Y., Morales, E., Rideout, J.A., Philippine Journal of Science , 1999, 128,121-29
Flavones from Coleus amboinicus
Ragasa, C.Y., Pendon, Z., Sangalang, V., J. A. Rideout, J.A., Philippine Journal of Science , 1999, 128,4347-351
Antimicrobial Chromenes from Eupatorium toppingianum
Ragasa, C.Y., Tepora, M., Rideout, J.A., ACGC Chemical Research Communications , 1999, 7,54-61
Clerodane Diterpenes from Tinospora rumphii
Ragasa, C.Y., Cruz, C., Gula, R., Rideout, J.A., Journal of Natural Products , 2000, 63,4509-511
A Flavone from Vitex parviflora
Ragasa, C.Y., Morales, E., Rideout, J.A., Manila Journal of Science , 2000, 3,26-9
Diterpenes from the soft coral Clavularia inflata
Alea, G.V., Ragasa, C.Y., Manila Journal of Science , 2000, 3,225-33
Antimicrobial Biflavone from Araucaria bidwillii
Ragasa, C.Y., Laygo, J., Rideout, J.A. , Kimika , 2000, 16,265-67
An antimicrobial and antimutagenic anthraquinone from Cassia alata
Hofilena, J., Ragasa, C.Y., Rideout, J.A., ACGC Chemical Research Communications , 2000, 10,16-20
Lignans from Gliricidia sepium
Ragasa, C.Y., Hofilena, J., Rideout, J.A. , ACGC Chemical Research Communications , 2000, 10,52-60
Diastereomeric Diterpenes from Coleus blumei
Ragasa, C.Y., Templora, V.F., Rideout, J.A. , Chemical & Pharmaceutical Bulletin , 2001, 49,7927-929
An Antifungal Cadinanolide from Pseudoelephantopus spicatus
Ragasa, C.Y., Rideout, J.A., Chemical & Parmaceutical Bulletin , 2001, 49,101359-1361
Antimicrobial Compounds from Mentha cordifolia
Ragasa, C.Y., Dumag, R., Rideout, J.A. , Philippine Journal of Science , 2001, 130,139-43
Antimicrobial Triterpenes and Sterols from Pseuderanthemum bicolor
Ragasa, C.Y., Yumul, J., Ganzon, G., Rideout, J.A., Kimika , 2001, 17,21-4
Antimicrobial compounds from Spondias purpurea
Ragasa, C.Y., Poblete, A., Navida, E. , Manila Journal of Science , 2001, 4,124-28
Ionone derivatives from Alternanthera sessilis
Ragasa, C.Y., Tremor, N., Rideout, J.A., Journal of Asian Natural Products Research , 2002, 4,2109-115
New furanoid diterpenes from Caesalpinia pulcherrima
Ragasa, C.Y., Hofileņa, J., Rideout, J.A. , Journal of Natural Products , 2002, 65,81107-1110
Antifungal compounds from Anacardium occidentale
Ragasa, C.Y., Borja, D., Bassig, R., Rideout, J.A., Philippine Journal of Science , 2002, 131,19-15
A Monoterpene from Pterocarpus indicus (Leguminosae)
Hofileņa, J.G., Ragasa, C.Y. , Kimika , 2002, 18,15-8
A new furanoid diterpene from Caesalpinia pulcherrima
Ragasa, C.Y., Ganzon, J.G., Hofileņa, J.G., Tamboong, B., Rideout, J.A. , Chemical & Pharmaceutical Bulletin , 2003, 51,101208-1210
Polyprenols from Jatropha curcas L. with unusual ions In electrospray ionisation mass spectroscopy
Rideout, J.A., Ragasa, C.Y., Ngo, H.T, ACGC Chemical Research Communications , 2003, 16,40-47
Secondary metabolites from Jasminum sambac and Cananga odorata
Ragasa, C.Y., Tamboong, B., Rideout, J.A. , ACGC Chemical Research Communications , 2003, 16,34-39
Antimutagenic Triterpenes and Sterols from Vitex parviflora
Ragasa, C.Y., Javier, E.C.S., Tan, I.G. , Philippine Journal of Science , 2003, 132,121-25
New cycloartenol esters from ixora coccinea
Ragasa, C.Y., Tiu, F., Rideout, J.A. , Natural Product Research , 2004, 18,4319-323
Antimicrobial compounds from Artocarpus heterophyllus
Ragasa, C.Y., Jorvina, K., Rideout, J.A. , Philippine Journal of Science , 2004, 133,297-101
Secondary metabolites from Bauhinia purpurea
Ragasa, C.Y., Hofileņa, J.G., Rideout, J.A. , Philippine Journal of Science , 2004, 133,11-4
Triterpenes and sterols from Achras zapota
Ragasa, C.Y., Jorvina, K., Rideout, J.A., Kimika , 2004, 20,1-21-4
Structure elucidation of b-Stigmasterol and b-Sitosterol from Sesbania grandiflora Linn Pers and b-Carotene from Heliotropium indicum Linn
Cayme, J.M.C., Ragasa, C.Y., Kimika , 2004, 20,1-25-12
Monoterpenelactones from the seeds of Nephelium lappaceum
Ragasa, C.Y., de Luna, R.D., Cruz, W.C., Rideout, J.A. , Journal of Natural Products , 2005, 68,91394-1396
Terpenoids and sterols from Lagerstroemia speciosa
Ragasa, C.Y., Ngo, H.T., Rideout, J.A. , Journal of Asian Natural Products Research , 2005, 7,17-12
Antimicrobial terpenoids from Pterocarpus indicus
Ragasa, C.Y., Hofileņa, J.G., De Luna, E. , Natural Product Research , 2005, 19,4305-309
Antifungal metabolites from Blumea balsamifera
Ragasa, C.Y., Co,A., Rideout,J.A. , Natural Product Research , 2005, 19,3231-237
Secondary metabolites from Schefflera odorata Blanco
Ragasa, C.Y., Lim, K., Philippine Journal of Science , 2005, 134,163-67
Sterols from Cucurbita maxima
Ragasa, C.Y., Lim, K., Philippine Journal of Science , 2005, 134,283-87
Antimicrobial sesquiterpenoids and diarylheptanoid from Curcuma domestica
Ragasa, C.Y., Laguardia, M., Rideout, J.A. , ACGC Chemical Research Communications , 2005, 18,23-26
Triterpenoids from Chrysanthemum morifolium
Ragasa, C.Y., Tiu, F., Rideout, J.A., ACGC Chemical Research Communications , 2005, 18,12-19
Antifungal diacetylglycerols from Malachra fasciata and Pithecolobium dulce
Ragasa, C.Y., Hofileņa, J.G., Co, A., Rideout, J.A., Asian Coordinating Group for Chemistry Chemical Research Communications , 2005, 19,1-5
Antimicrobial diterpenes from Tinospora rumphii
Ragasa, C.Y., Cruz, M.C. , Journal of Research in Science and Engineering , 2005, 2,30-34
Antimicrobial terpenoids from Lansium domesticum
Ragasa, C.Y., Labrador, P., Rideout, J.A. , Philippine Agricultural Scientist , 2006, 89,1507-511
New xenicanes from Xenia viridis
Janairo, J.R.O., Janairo, G.C., Ragasa, C.Y., Natural Product Research , 2007, 21,121067-1072
Iridoids from Gardenia jasminoides
Ragasa, C.Y., Pimenta, L.E.N., Rideout, J.A., Natural Product Research , 2007, 21,121078-1084
Monoterpene glycoside and flavonoids from Blumea lacera
Ragasa, C.Y., Wong, J., Rideout, J.A. , Journal of Natural Medicines , 2007, 61,4474-475
A triterpene from Musa errans
Ragasa, C.Y., Martinez, A.T., Chua, J.E., Rideout, J.A. , Philippine Journal of Science , 2007, 136,2167-171
A triterpene from Rosa sp.
Ragasa, C.Y., Alimboyougen, A., Rideout, J.A., Journal of Research in Science, Computing, and Engineering , 2007, 4,21-5
A new fatty acid ester of a Dolabellane diterpene from Clavularia sp
Janairo, J.R.O., Janairo, G.C., Ragasa, C.Y. , Journal of Research in Science, Computing, and Engineering , 2007, 4,351-59
Terpenoids from Tithonia diversifolia
Ragasa, C.Y., Tepora, M.M., Rideout, J.A. , Journal of Research in Science, Computing, and Engineering , 2007, 4,11-7
Chromomoric acid derivatives from Tectona philippinensis
Ragasa, C.Y., Tepora, M., Espinelli, D., Mandia, E., Journal of Natural Products , 2008, 71,4701-705
A new rearranged Dolabellane diterpene from the soft coral Clavularia inflata
Alea, G.V., Bowden, B.F., Ragasa, C.Y., Natural Product Research , 2008, 22,9814-819
Secondary metabolites from Tectona philippinensis
Ragasa, C.Y., Lee, J.J., Lapina, M., Mandia, E., Rideout, J.A., Natural Product Research , 2008, 22,9820-824
A marine Verticillane diterpenoid from Cespitularia erecta
Janairo, J.R.O., Janairo, G.C., Ragasa, C.Y., Natural Product Research , 2008, 22,145-82
 
TOP
 ASSOCIATION MEMBERSHIP, ETC.    
 
Association Position From To
American Chemical Society Member 2005-present
Phytochemical Society of Europe Member 2007
Philippine-American Academy of Science and Engineering Member 2007
Philippine Association for the Advancement of Science Member 2005
Integrated Chemists of the Philippines Board of Directors 1966
Kapisanan ng mga Kimiko ng Pilipinas Member -
National Research Council of the Philippines (NRCP) Division X, Vice-Chairman 2004-present
UP-Chemistry Alumni Foundation (UP-CAF) Member -
Regional Network for the Chemistry of Natural Products . -
Organic Chemistry Teachers Association (OCTA) . -
Natural Products Society of the Philippines (NPSP) Member, Board of Directors 1999-2001
New York Academy of Sciences . 1995
 
      from Scientists Database
URL:http://webdb.stii.dost.gov.ph