JOURNAL 535


Records of Natural Products
VOLUME & ISSUE
Year: 2015 Issue: 2 April-June
PAGES
p.251 - 256
STATISTICS
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AUTHORS
    Gilmara A. C. Fortes, Ariadne G. Carvalho, Ruver R. F. Ramalho, Antônio J. R. da Silva, Pedro H. Ferri and Suzana C. Santos
PDF OF ARTICLE

GRAPHICAL ABSTRACT


ABSTRACT


Aphytochemical investigation of Eugenia uniflora ’s leaf extract resulted in the isolation of eleven phenolic compounds: 2,3-di-O-galloyl- b - D -glucose (1), 1,2,3,4,6-penta-O-galloyl- b - D -glucose (2), gemin D (3), hippomanin A (4), oenothein B (5), eugeniflorin D 2 (6), camptothin A (7), afzelin (8), quercitrin (9), myricitrin, (10) and desmanthin-1 (11). These compounds were identified by spectroscopic methods including 1D- and 2D-NMR, UV, IR, and TOF/MS. Compounds 1, 2, 3, 4, 7, 8, 9, and 11 were isolated from this species for the first time. Ten isolates were evaluated for antioxidant activity by DPPH free radical and Oxygen Radical Absorbance Capacity (ORAC-Fluorecein) assay . Dimeric tannins, oenothein B (5), eugeniflorin D 2 (6), and camptothin A (7) showed a remarkable radical scavenging capacity.

KEYWORDS
  • Hydrolysable tannins
  • camptothin A
  • desmanthin-1
  • pitanga
  • DPPH
  • ORAC assay

SUPPORTING INFORMATION


Supporting Information
Download File 29-RNP-1404-059_SI.pdf (2.12 MB)