Latifolosides K and L, Two New Triterpenoid Saponins from the Bark of Ilex latifolia

Abstract

Two new triterpenoid saponins, latifoloside K (1), 3-O-β-D-glucopyranosyl-(1→3)-[α-L-rhamnopyranosyl-(1→2)-]-α-L-arabinopyranosyl 3β-hydroxy-urs-12, 18-dien-28-oic acid 28-O-β-D-glucopyranosyl ester and latifoloside L (2), 3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-(1→3)-[α-L-rhamnopyranosyl-(1→2)-]-α-L-arabinopyranosyl 3β, 19α-dihydroxyursolic acid, were isolated from the bark of Ilex latifolia THUNB. Also isolated were two known compounds, ilekudinoside A (3) and kudinoside G (4). Structural assignments were established on the basis of spectroscopic data and chemical evidence.