New oleanane saponins from Schefflera kwangsiensis

Abstract

Four new oleanane-type triterpenoid saponins, schefflesides I–L (1–4), were isolated from the aerial parts of Schefflera kwangsiensis. Their structures were established as oleanolic acid 3-O-β-d-glucopyranosyl (1→2) [α-l-arabinopyranosyl (1→4)]-β-d-(6-O-methyl) glucuronopyranoside (1), 22α-hydroxyoleanolic acid 3-O-α-l-arabinopyranosyl (1→4)-β-d-glucuronopyranoside (2), hederagenin 3-O-α-l-arabinopyranosyl (1→4)-β-d-glucuronopyranoside (3) and oleanolic acid 28-O-β-d-glucopyranosyl (1→2)-β-d-glucuronopyranosyl ester (4) by spectroscopic analyses (HRESIMS, 1D and 2D NMR) and chemical methods.