Seven steroidal glycosides have been isolated from the fruits of Solanum torvum Swartz. Their structures were established by 2D NMR spectroscopic techniques (1H,1H-COSY, TOCSY, NOESY, HSQC, and HMBC) and mass spectrometry as (25S)-26-(β-d-glucopyranosyloxy)-3-oxo-5α- furost-20(22)-en-6α-yl-O-β-d-xylopyranoside (1), (25S)-26-(β-d- glucopyranosyloxy)-3-oxo-22α-methoxy-5α-furostan-6α-yl-O- β-d-xylopyranoside (2), (25S)-26-(β-d-glucopyranosyloxy)-3β- hydroxy-22α-methoxy-5α-furostan-6α-yl-O-α-l- rhamnopyranosyl-(1 → 3)-β-d-glucopyranoside (3), (25S)-3β- hydroxy-5α-spirostan-6α-yl-O-β-d-xylopyranoside (4), (25S)-3-oxo-5α-spirostan-6α-yl-O-β-d-xylopyranoside (5), (25S)-3β-hydroxy-5α-spirostan-6α-yl-O-β-d-glucopyranoside (6), (25S)-3β,27-dihydroxy-5α-spirostan-6α-yl-O-β-d- glucopyranoside (7).
All Science Journal Classification (ASJC) codes
- Molecular Biology
- Plant Science