Sesquiterpene glycosides and triterpenes from the chloroform extract of Pittosporum pentandrum (Blanco) Merrill
Date of Publication
1995
Document Type
Master's Thesis
Degree Name
Master of Science in Chemistry
Subject Categories
Chemistry
College
College of Science
Department/Unit
Chemistry
Thesis Adviser
Dr. Consolacion Y. Ragasa
Defense Panel Chair
Dr. Gerardo, C. Janairo
Defense Panel Member
Jaime Raul O. Janairo
Marissa G. Noel
Abstract/Summary
The choroform extract of Pittosporum pentandrum (Blanco) Merrill yielded a mixture of four sesquiterpene glycosides and another mixture of two triterpenes by gravity column chromatography (dry) packing. The structures of these constituents were elucidated by IR, 1H-NMR, 13C-NMR, DEPT, 1H-1H COSY sprectroscopy and mass spectrometry. On the basis of a formula index search, the proposed structures of the compounds are novel. The relative stereochemistry of the sesquiterpene glycosides were determined by a combination of coupling constants analyses and NOESY. The sesquiterpene glycosides were acetylated, and the derivatized products were analyzed by 1H-NMR to confirm the proposed structures.
Abstract Format
html
Language
English
Format
Accession Number
TG02477
Shelf Location
Archives, The Learning Commons, 12F Henry Sy Sr. Hall
Physical Description
162 leaves
Keywords
Medicinal plants; Plants; Useful; Extracts; Glycosides; Solution (Chemistry); Terpenes -- Spectra; Chloroform -- Spectra; Antibacterial agents
Recommended Citation
Tierra, D. S. (1995). Sesquiterpene glycosides and triterpenes from the chloroform extract of Pittosporum pentandrum (Blanco) Merrill. Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/1713
