Six new phenolic derivs., including four flavonoids and two benzofuranones, were isolated from the aerial part exts. of Vernonia mapirensis Gleason (synonymous Lepidaploa mapirensis (Gleason) H. Robinson, Vernonia trichoclada Gleason, Asteraceae family), together with four known flavonoids. Their structural elucidation was achieved by extensive spectroscopic methods, 1D- (1H, 13C, 13C DEPT, TOCSY, ROESY) and 2D-NMR expts. (DQF-COSY, HSQC, HMBC) as well as ESI-MS anal.
New phenolic derivatives from Vernonia mapirensis Gleason
BRACA, ALESSANDRA;
2007-01-01
Abstract
Six new phenolic derivs., including four flavonoids and two benzofuranones, were isolated from the aerial part exts. of Vernonia mapirensis Gleason (synonymous Lepidaploa mapirensis (Gleason) H. Robinson, Vernonia trichoclada Gleason, Asteraceae family), together with four known flavonoids. Their structural elucidation was achieved by extensive spectroscopic methods, 1D- (1H, 13C, 13C DEPT, TOCSY, ROESY) and 2D-NMR expts. (DQF-COSY, HSQC, HMBC) as well as ESI-MS anal.File in questo prodotto:
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