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A furostanol glycoside from rhizomes of Costus spicatus
August 1999
August 1999
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Abstract
A new furostanol glycoside was isolated from the rhizomes of Costus spicatus. Its
structure was established as (3 beta,22 alpha,25R)-26-(beta -D-glucopyranosyloxy)-22-methoxyfurost-5-en-3-yl
O-D-apio-beta-D-furanosyl-(1-->2)-O-[6-deoxy-alpha-L-mannopyranosy l-(1-->4)]- beta-D-glucopyranoside.
The structural identification was performed using detailed analysis of 1H and 13C
NMR spectra including 2D NMR spectroscopic techniques (COSY, HETCOR and COLOC) and
chemical conversions.