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  • Title: Polyhydroxylated spirostanol saponins from the tubers of Dioscorea polygonoides.
    Author: Osorio JN, Mosquera Martinez OM, Correa Navarro YM, Watanabe K, Sakagami H, Mimaki Y.
    Journal: J Nat Prod; 2005 Jul; 68(7):1116-20. PubMed ID: 16038563.
    Abstract:
    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.
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