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From the leaves of Aralia chinensis, 3 oleanane-type triterpene glycosides have been isolated, including 1 new glycoside, 3β,23 -dihydroxyolean-12-ene-28-oic acid 3 -O-β-d-glucopyranosyl-(1→3)- α-l-arabinopyranosyl-(1→3)-β-d-glucuronopyranoside 28 -O-β-d-glucopyranosyl ester (named as araliachinoside A, 1), and 2 known ones, 3β,23 -dihydroxyolean-12-ene-28-oic acid 3 -O-α-l-arabinopyranosyl-(1→3)- β-d-glucuronopyranoside 28 -O-β-d-glucopyronosyl ester (2) and 3β-hydroxyolean-12-ene-28-oic acid 3 -O-β-d-glucurono pyranoside 28 -O-β-d-glucopyronosyl ester (3). Their chemical structures were elucidated by using a combination of high-resolution electrospray ionization-mass spectrometry, 1-dimensional and 2-dimensional nuclear magnetic resonance spectral data, and by comparison with previous literature. Compounds 1-3 displayed cytotoxic activity toward KB and HepG2 cell lines with half-maximal inhibitory concentration values ranging from 8.1 ± 0.1 to 15.7 ± 0.3 µM in in vitro assay.

Araliachinoside A: A New Triterpene Glycoside From Aralia chinensis Leaves