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Pregnane Glycosides from Gymnema alternifolium
Author(s) -
Lin YunLian,
Wu YanMing,
Kuo YuehHsiung,
Chen ChiehFu
Publication year - 1999
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199900114
Subject(s) - chemistry , pregnane , glycoside , stereochemistry
Three new polyoxypregnane glycosides, gymnepregosides G, H, and I, together with four known compounds were isolated from the stems of Gymnema alternifolium. The structural elucidation were determined principally by spectral data, and assigned to be 12‐ O ‐cinnamoyl‐3β,5α,8β,12β,14β,17β,20‐heptahydroxy‐(20 S )‐pregn‐6‐enyl‐3‐ O ‐β‐ D ‐cymaropyranoside ( 1 ), 20‐ O ‐benzoyl‐12‐ O ‐cinnamoyl‐3β,5α,8β,12β,14β,17β,20‐heptahydroxy‐(20 S )‐pregn‐6‐enyl‐3‐ O ‐β‐ D ‐cymaropyranoside ( 2 ), and penupogenin 3‐ O ‐β‐ D ‐cymaropyranoside ( 3 ), respectively.