Cytotoxic constituents fromSolanum lyratum

Activity-guided fractionation of the ethanol extract of the whole plant fromSolanum lyratum resulted in the isolation of a new pregnane derivative glycoside, 16-dehydropregnenolone 3-O-α-l-rhamnopyranosyl-(1→2)-β-d-glucopyranosid uronic acid (2), as well as other six known compounds: 16-dehydropregnenolone (1), allopregenolone (3), protocatechuic acid (4), vanillic acid (5), caffeic acid (6), and scopoletin (7). The structure of the isolated compounds were elucidated on the basis of their spectral data and chemical evidences. Compounds1, 3, 4 were isolated for, the first time from this plant. Cytotoxic activities of the isolated compounds were evaluated. Compound1 exhibited significant cytotoxic activity against A375-S2, HeLa, SGC-7901, and Bel-7402 with IC50 values of 13.1±0.9, 21.5±1.0, 40.2±0.7, and 49.8±1.2 μg/mL, respectively.