Bx. Ma et al., NOVEL SAPONINS HAINANEOSIDE-A AND HAINANEOSIDE-B ISOLATED FROM MARSDENIA-HAINANENSIS, Journal of natural products, 60(2), 1997, pp. 134-138
Novel saponins possessing fertility-regulating activity, hainaneosides
A (1) and B (2), have been isolated from the twigs and stems of Marsd
enia hainanensis, and their structures have been elucidated unambiguou
sly as 12-nicotinoyl -D-cymaropyranosyl-(1-->4)-beta-D-cymaropyranosid
e and 12-nicotinoyl-20-cinnamoyl ta-D-allopyranosyl-(1-->4)-beta-D-cym
aropyranoside using NMR spectroscopic techniques and chemical transfor
mations.