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| Genre/Form: | Journal article. |
|---|---|
| Material Type: | Internet resource |
| Document Type: | Internet Resource, Article |
| All Authors / Contributors: | Monteiro, Verônica de F.F.; Mathias, Leda; Vieira, Ivo J.C.; Schripsema, Jan; Braz-Filho, Raimundo |
| ISSN: | 0103-5053 |
| OCLC Number: | 57078176 |
Abstract:
Three new natural cinnamic acid and dihydrocinnamic acid derivatives were isolated from the roots of Brosimum gaudichaudii, in addition to fourteen known substances (ten coumarins, one chalcone, beta-sitosterol, 3beta-O-beta-D-glucopyranosylsitosterol and beta-amyrin). The structures were established by spectral data, including analysis of 2D-NMR experiments and mass spectra. All aromatic compounds have 4-hydroxy-3-prenylcinnamic acid as a common precursor. The new substances are derived from a precursor of the coumarins, which through an O-methylation lost its ability to form the lactone ring.
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