Triterpenoid saponins and others glycosides from the stem barks of Pancovia turbinata Radlk

International audienceIn our continuing search of saponins from the plant of Sapindaceae family, phytochemical investigation of thestem barks of Pancovia turbinata Radlk., led to the isolation and structural characterization of two new tri-terpenoid saponins, named turbinatosides A-B (1–2), one new farnesyl glycoside, named turbinoside A (3), onenew coumarin glucoside, named panturboside A (4), together with a known saponin (5). The structures of thenew compounds were established, using extensive analysis of NMR techniques, mainly 1D NMR (1H, 13C, andDEPT) and 2D NMR (COSY, NOESY, HSQC, HSQC-TOCSY and HMBC) experiments, HRESIMS and by comparisonwith the literature data, as 3-O-β-D-xylopyranosyl-(1 → 3)-α-L-arabinopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1→ 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosylhederagenin 28-O-β-D-glucopyranosyl ester (1), 3-O-α-L-arabinopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyr-anosylhederagenin 28-O-β-D-xylopyranosyl-(1 → 4)-β-D-glucopyranosyl ester (2), 1-O-{β-D-glucopyranosyl-(1 →3)-α-L-rhamnopyranosyl-(1 → 2)-[α-L-rhamnopyranosyl-(1 → 6)]-β-D-glucopyranosyl}-(2E,6E)-farnes-1,12-diol(3), and 5-O-β-D-glucopyranosyl-5,6,7-trihydroxy-8-methoxycoumarin (4), respectively. Our findings highlightthe presence of -3Rha-2Ara-3hederagenin oligosaccharidic sequence usually described in saponins from Sapin-doideae subfamily of Sapindaceae family, as well as farnesol glycosides, and represent therefore a valuablecontribution to the chemotaxonomy of the Sapindoideae subfamil