A new steroidal glycoside from Corypha taliera Roxb., a globally endangered species.

A new steroidal glycoside, β-sitosterol-3-O-α-L-rhamnopyranosyl-(1→4)-β-D-xylopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-β-D-glucopyranoside was isolated from the methanol extract of the pericarp of Corypha taliera Roxb. The reversed-phased HPLC analysis of the methanol extract of the pericarp of C. taliera Roxb. (Talipalm), a rare species of Arecaceae family, afforded a new steroidal glycoside, β-sitosterol-3-O-α-L-rhamnopyranosyl-(1→4)-β-D-xylopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-β-D-glucopyranoside (1). The structure of the compound was elucidated unequivocally by UV, IR, HR-ESI-MS, (1)H and (13)C NMR spectroscopic studies.