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Chemical constituents from Bombacopsis glabra (Pasq.) A. Robyns: Complete H-1 and C-13 NMR assignments and X ray structure of 5-hydroxy-3,6,7,8,4 '-pentamethoxyflavone
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UNSPECIFIED (2002) Chemical constituents from Bombacopsis glabra (Pasq.) A. Robyns: Complete H-1 and C-13 NMR assignments and X ray structure of 5-hydroxy-3,6,7,8,4 '-pentamethoxyflavone. JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY, 13 (2). pp. 276-280. ISSN 0103-5053
Full text not available from this repository.Abstract
The flavone 5-hydroxy-3,6,7,8,4'-pentamethoxyflavone (1) and the triterpenes lupenone, 9,19-cyclolanost-23-ene-3beta,25-diol (2), (24R)-9,19-cyclolanost-25-ene-3beta,24-diol (3) and (24S)-9,19cyclolanost-25-ene-3beta,24-diol (4) were isolated from the hexane extract of the stem bark of Bombacopsis glabra (Bombacaceae). The structures were determined by C-13 and H-1 NMR (1D and 2D) and mass spectrometry, and by comparison with literature data for triterpenes. The structure of the flavone 1 was unambiguously confirmed by a X-ray diffraction study. The five substances were isolated for the first time from Bombacaceae species.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Journal or Publication Title: | JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY |
| Publisher: | SOC BRASILEIRA QUIMICA |
| ISSN: | 0103-5053 |
| Date: | March 2002 |
| Volume: | 13 |
| Number: | 2 |
| Number of Pages: | 5 |
| Page Range: | pp. 276-280 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/11090 |
Data sourced from Thomson Reuters' Web of Knowledge
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