New C27 Steroidal Bisdesmosides from the Fresh Stems of Dracaena cambodiana
✍ Scribed by Min Xu; Chong-Ren Yang; Ying-Jun Zhang
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- German
- Weight
- 179 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Two new steroidal bisdesmosides, cambodracanosides A and B (1 and 2, resp.), were isolated from the fresh stems of Dracaena cambodiana, together with seven known glycosides. The structures of the new saponins were elucidated on the basis of detailed spectroscopic analyses, including 1D‐ and 2D‐NMR techniques, and acidic hydrolysis.
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## Abstract magnified image Two new glycosides, (3__β__,8__β__,9__α__,16__α__,17__α__)‐14,16__β__ : 15,20__α__:18,20__β__‐triepoxy‐16__α__,17__α__‐dihydroxy‐14‐oxo‐13,14 : 14,15‐disecopregna‐5,13(18)‐dien‐3‐yl __α__‐cymaropyranosyl‐(1→4)‐__α__‐digitoxopyranosyl‐(1→4)‐__α__‐oleandropyranoside (**1*
## Abstract Two new pregnane glycosides, (3__β__,5__α__,12__β__,14__β__,17__α__)‐3‐(__β__‐cymaropyranosyloxy)‐8,14,17,20‐tetrahydroxypregnan‐12‐yl benzoate (**1**) and (3__β__,5__α__,12__β__,14__β__,17__α__)‐3‐(__β__‐cymaropyranosyloxy)‐8,14,17,20‐tetrahydroxypregnan‐12‐yl cinnamate (**2**) were is
## Abstract Three new glycosides, (3__β__,5__α__,8__α__,11__α__,12__β__,14__β__,17__α__,20__R__)‐3‐[(2,6‐dideoxy‐4‐__O__‐(6‐deoxy‐3‐__O__‐methyl‐__β__‐D‐allopyranosyl)‐3‐__O__‐methyl‐__β__‐D‐__arabino__‐hexopyranosyl)oxy]‐12‐__O__‐tigloyl‐8,20 : 11,20‐diepoxypregnane‐12,14‐diol (**1**), (3__β__,5__