Cyprotuoside C and cyprotuoside D, two new cycloartane glycosides from the rhizomes of Cyperus rotundus

Abstract

Cyprotuoside C (1) and cyprotuoside D (2), two new cycloartane glycosides were isolated from the ethanol extract of the rhizomes of Cyperus rotundus. Their structures were identified as 24R-9, 10-seco-cycloartan-1 (10), 9 (11)-dien-3β, 7β, 24, 25-tetraol 3-O-β-D-xylopyranosyl-(1→4)-[α-L-arabinopyranosyl-(1→6)]-β-D-glucopyranosyl-25-O-β-D-glucuronide (1) and 9, 10-seco-cycloartan-1 (10), 9 (11), 23 (24)-trien-3β, 7β, 25-triol 3-O-β-D-xylopyranosyl-(1→4)-{α-L-arabinopyranosyl-(1→6)-[ α-L-rhamnopyranosyl-(1→2)-]}-β-D-glucopyranosyl-25-O-β-D-glucuronide (2) by spectroscopic methods.