Two New Glycosides from the Roots of Cynanchum versicolor.
Two new glycosides named cynanversicoside-A and -B, together with glaucogenin-C as the aglycone, were isolated from the Chinese crude drug "Pai-Wei", CYNANCHUM VERSICOLOR Bunge (Asclepiadaceae). Their structures were determined on the basis of spectral and chemical evidence as glaucogenin-C 3- O-beta- D-cymaropyranosyl-(1-->4)-alpha- L-diginopyranosyl-(1-->4)-beta- D-thevetopyranoside and glaucogenin-C 3- O-beta- D-glucopyranosyl-(1-->4)-beta- D-cymaropyranosyl-(1-->4)-alpha- L-diginopyranosyl-(1-->4)-beta- D-thevetopyranoside.
Sheng-Xiang
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Q
Kunming Institute of Botany, Academia Sinica, Kunming, People's Republic of China.
Zhuang-Xin
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Z
Lin
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Y
Jun
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