Chemical constituents of Eugenia catharinae and their antioxidant activity

Nine compounds were isolated from the leaves of Eugenia catharinae, namely monomethyl olivetol (1), β-sitosterol (2), stigmasterol (3), uvaol (4), erythrodiol (5), rotundic acid (6), quercetin (7), catechin (8) and myricitrin (9). The structures of 1-9 were established through analysis of their spec...

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Published inNatural product research Vol. 30; no. 22; pp. 2624 - 2628
Main Authors Moresco, Henrique H., Colla, Guilherme, Cavalcante, Ingrid D., Queiroz, Gustavo S., Pizzolatti, Moacir G., Brighente, Inês M. C.
Format Journal Article
LanguageEnglish
Published England Taylor & Francis 16.11.2016
Subjects
DPPH
Eugenia catharinae
monomethyl olivetol
rotundic acid
rotundic acid
DPPH
monomethyl olivetol
Eugenia catharinae
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Summary:Nine compounds were isolated from the leaves of Eugenia catharinae, namely monomethyl olivetol (1), β-sitosterol (2), stigmasterol (3), uvaol (4), erythrodiol (5), rotundic acid (6), quercetin (7), catechin (8) and myricitrin (9). The structures of 1-9 were established through analysis of their spectroscopic ( 1 H and 13 C NMR) and spectrometric (MS) data. Compounds 1 and 6 are reported the first time in the Eugenia genus. In addition, these data were compared with those reported in the literature. The antioxidant activity of plant samples and compounds was measured using the DPPH radical scavenging assay. Flavonoids 7, 8, 9 and the ethanolic extract showed the best results, with IC 50 values of 20.94 μM, 44.20 μM, 30.01 μM and 58.82 μg/mL, respectively.
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ISSN:1478-6419
1478-6427
DOI:10.1080/14786419.2015.1131981