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題名 | Pregnane Glycosides from Gymnema alternifolium |
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作者 | 林雲蓮; 吳遠銘; 郭悅雄; 陳介甫; | 書刊名 | Journal of the Chinese Chemical Society |
卷期 | 46:5 1999.10[民88.10] |
頁次 | 頁841-846 |
分類號 | 414.33 |
關鍵詞 | 懷孕; 糖苷; Gymnema alternifolium; Asclepiadaceae; Polyoxypregnane; Pregnane glycosides; |
語文 | 英文(English) |
英文摘要 | Three new polyoxypregnane glycosides, gymnepregosides G, H, and I, together with four known compounds were isolated from the stems of Gymmema alternifolium. The structural elucidation were determined principally by spectral data, and assigned to be 12-O-cinnamoyl-3 β,5 α,8 β,12 β,14 β,17 β, 20-heptahydroxy-(20S) -pregn-6-enyl-3-O- β -D-cymaropyranoside (1) , 20-O-benzoyl-12-O-cinnamoyl-3 β, 5 α, 8 β, 12 β, 14 β, 17 β , 20-heptahydroxy-(20S) -pregn-6-enyl-3-O- β -D-cymaropyranoside (2) , and penupogenin 3-O- β -D-cymaropyranoside (3), respectively. |
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