M. Haraguchi et al., New polyhydroxylated steroidal sapogenin and saponin from the leaves of Cestrum sendtenerianum, CHEM PHARM, 47(4), 1999, pp. 582-584
New polyhydroxylated spirostanol sapogenin (1) and saponin (2) were isolate
d from the leaves of Cestrumsendtenerianum (Solanaceae). Their structures w
ere determined to be spirosta-5,25(27)-diene-1 beta,2 alpha,3 beta,12 beta-
tetrol (1) and spirosta-5,25(27)-diene-1 beta,2 alpha,3 beta,12 beta-tetrol
3-O-beta-D-galactopyranoside (2), respectively, on the basis of spectrosco
pic analysis, including two-dimensional NMR techniques, and the result of h
ydrolytic cleavage.