A new triterpenoid saponin and an oligosaccharide isolated from the fruits of Sapindus mukorossi

A new triterpenoid saponin (1) and a new oligosaccharide (2), together with three known saponins (3–5), have been isolated from n-BuOH extract of the fruits of Sapindus mukorossi Gaertn. The structures were elucidated using detailed analysis of one- and two-dimensional nuclear magnetic resonance spectra along with their mass spectrometric data and the results of acid hydrolysis. Of the isolated compounds 1 and 3–5 displayed cytotoxic effects against human cancer cell lines in A-549 (lung carcinoma), MDA-231 (breast carcinoma) and PC-3 (prostatic carcinoma).