An echinocystic acid saponin derivative from Kalimeris shimadae

Article abstract of DOI:10.1016/0031-9422(96)00247-6

A new triterpene saponin, shimadoside A, has been isolated from Kalimeris shimadae and its structure deduced as 3-O-β-D- glucopyranosiduronic acid-3β-16α-dihydroxyolean-12-en-28-oic acid 28-O-β- D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl (1 → 4)-α-L-rhamnopyranosyl-(1 → 2)-β-D-xylopyranoside by means of spectral data, especially NMR, including COSY, HMQC, HOHAHA and ROESY techniques, and chemical degradation.