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A furostanol glycoside from rhizomes of Costus spicatus

1999; Elsevier BV; Volume: 51; Issue: 7 Linguagem: Inglês

10.1016/s0031-9422(99)00077-1

1873-3700

Bernadete Pereira da Silva, Róbson Roney Bernardo, José Paz Parente,

Sesquiterpenes and Asteraceae Studies

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.