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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.

Cyprotuoside C and Cyprotuoside D, Two New Cycloartane Glycosides from the Rhizomes of <i>Cyperus rotundus</i>