ABSTRACT
Seven steroidal glycosides have been isolated from the fruits of Solanum torvum Swartz. Their structures were established by 2D NMR spectroscopic techniques ((1)H,(1)H-COSY, TOCSY, NOESY, HSQC, and HMBC) and mass spectrometry as (25S)-26-(ß-D-glucopyranosyloxy)-3-oxo-5α-furost-20(22)-en-6α-yl-O-ß-D-xylopyranoside (1), (25S)-26-(ß-D-glucopyranosyloxy)-3-oxo-22α-methoxy-5α-furostan-6α-yl-O-ß-D-xylopyranoside (2), (25S)-26-(ß-D-glucopyranosyloxy)-3ß-hydroxy-22α-methoxy-5α-furostan-6α-yl-O-α-L-rhamnopyranosyl-(1â3)-ß-D-glucopyranoside (3), (25S)-3ß-hydroxy-5α-spirostan-6α-yl-O-ß-D-xylopyranoside (4), (25S)-3-oxo-5α-spirostan-6α-yl-O-ß-D-xylopyranoside (5), (25S)-3ß-hydroxy-5α-spirostan-6α-yl-O-ß-D-glucopyranoside (6), (25S)-3ß,27-dihydroxy-5α-spirostan-6α-yl-O-ß-D-glucopyranoside (7).
Subject(s)
Fruit/chemistry , Saponins/chemistry , Solanum/chemistry , Magnetic Resonance Spectroscopy , Mass Spectrometry , Molecular StructureABSTRACT
The volatile components from the leaves of Solanum bicolor Roemer & Schultes, was obtained by hydrodistillation and was analizad by GC/MS. A total of 20 compounds, representing 96.3 % of the oil, were identified. The dominant compounds were trans-caryophyllene (23.2%), trans-2-pentadecene (22.6%), germacrene D (12.2%), biciclogermecrene (8.0%) and caryophyllene oxide (4.7%).