Three new nortriterpenoidal saponins, guaianins A (I), A1, and B, were isolated from the stem bark of G. officinale (Zygophyllaceae). The structure of these saponins was established on the basis of spectral evidence as 3-O-[α-L-rhamnopyranosyl(1-2)-α-L-arabinopyranosyl]-30-norolea-12,20(29)-dien-28-oic acid, 3-O-[α-L-rhamnopyranosyl(1-3)-α-L-arabinopyranosyl]-30-norolea-12,20(29)-dien-28-oic acid and 3-O-[α-L-rhamnopyranosyl(1-3)[β-D-glucopyranosyl](1-3)-α-L-arabinopyranosyl-30-norolea-12,20(29)-dien-28-O-β-D-glucopyranosyl ester, resp.
TRITERPENOID SAPONINS OF GUAIACUM-OFFICINALE
RICCIO, Raffaele;
1989-01-01
Abstract
Three new nortriterpenoidal saponins, guaianins A (I), A1, and B, were isolated from the stem bark of G. officinale (Zygophyllaceae). The structure of these saponins was established on the basis of spectral evidence as 3-O-[α-L-rhamnopyranosyl(1-2)-α-L-arabinopyranosyl]-30-norolea-12,20(29)-dien-28-oic acid, 3-O-[α-L-rhamnopyranosyl(1-3)-α-L-arabinopyranosyl]-30-norolea-12,20(29)-dien-28-oic acid and 3-O-[α-L-rhamnopyranosyl(1-3)[β-D-glucopyranosyl](1-3)-α-L-arabinopyranosyl-30-norolea-12,20(29)-dien-28-O-β-D-glucopyranosyl ester, resp.File in questo prodotto:
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