Three new polyhydroxylated spirostanol saponins (1-3) were isolated from the tubers of Dioscorea polygonoides. The structures of these new compounds were determined on the basis of extensive spectroscopic analysis and the results of acid or enzymatic hydrolysis as (23S,24R,25S)-23,24-dihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (1), (23S,25R)-12alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (2), and (23S,25R)-14alpha,17alpha,23-trihydroxyspirost-5-en-3beta-yl O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (3), respectively.
SteroidsSteroids U 0300 Diospolysaponin A, a New Polyoxygenated Spirostanol Saponin from the Tubers of Dioscorea polygonoides. -(OSORIO, J. N.; MOSQUERA MARTINEZ, O. M.; CORREA NAVARRO, Y. M.; MIMAKI*, Y.; SAKAGAMI, H.; SASHIDA, Y.; Heterocycles 60 (2003) 7, 1709-1715; Sch. Pharm., Univ. Pharm. Life Sci., Hachioji, Tokyo 192, Japan; Eng.) -Mais 43-160
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