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A novel acetylated triterpene bisdesmoside saponin is elucidated as named Hederagenin 3-O-α-L-rhamnopyranosyl (3→1)-[2,4-O-diacetyl-α-L-arabinopyranosyl]-28-O-β-D-glucopyranosyl-(2→1) [3-O-acetyl-β-D-glucopyranosyl] ester (1) along with two known saponins, hederagenin 3-O-(α-L-arabinopyranoside-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside (2) and hederagenin 3-O-[β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside] (3), from the pericarps of Sapindus mukorossi. The structures of these saponins were characterized by means of chemical and spectral methods including advanced 2D NMR studies.

A new acetylated triterpenoid saponin elucidated as hederagenin-3-O-β-D-xylopyranosyl (2→1)-[3-O-acetyl-α-L-arabinopyranosyl-28-O-α-L-rhamnopyranosylester has been isolated from pericarps of Sapindus mukorossi Gaertn. The structure of the compound was determined by means of chemical and spectral analysis including advanced 2D NMR studies. The ethanolic extract from pericarps of the plant showed significant in vitro antimicrobial activity against various test organisms by Agar well diffusion method.