Structure elucidation of β-stigmasterol and β-sitosterol from Sesbania grandiflora (Linn.) pers. and β-carotene from Heliotropium indicum Linn. by NMR spectroscopy
The flowers of Sesbania grandiflora (Linn.) Pers. afforded a 3:2 mixture of β-stigmasterol (1a) and β-sitosterol (1b), and oleanolic acid (2), while the leaves of Heliotropium indicum Linn. yielded β-carotene (3), lutein ( 4), a mixture of polyprenols (5), and a mixture of β-stigmasterol and β-sitos...
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| Main Authors: | , |
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| Format: | text |
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Animo Repository
2004
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| Online Access: | https://animorepository.dlsu.edu.ph/faculty_research/5726 |
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| Institution: | De La Salle University |
| Summary: | The flowers of Sesbania grandiflora (Linn.) Pers. afforded a 3:2 mixture of β-stigmasterol (1a) and β-sitosterol (1b), and oleanolic acid (2), while the leaves of Heliotropium indicum Linn. yielded β-carotene (3), lutein ( 4), a mixture of polyprenols (5), and a mixture of β-stigmasterol and β-sitosterol. The structures of 1a, 1b, and 3 were elucidated by extensive 1D and 2D NMR analyses. Antimicrobial activity tests on 3 indicated that it has high activity against Pseudomonas aeruginosa and Aspergillus niger, slight activity against Staphylococcus aureus, Escherichia coli, Candida albicans, and Trichophyton mentagrophytes, and inactive against Bacillus subtilis. |
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