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. 2017 Aug 18;11:83. doi: 10.1186/s13065-017-0300-6

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Scavenging potential of C. opaca leaves. a DPPH radical scavenging activity. b Superoxide inhibition. c Total antioxidant capacity. d hydroxyl percentage inhibition. e Hydrogen peroxide percent inhibition. f ABTS percent inhibition. g β-Carotene percent inhibition. h Chelating ability of various fractions of C. opaca fruit at different concentrations. Each value represents a mean ± SD (n = 3). hlc n-Hexane fraction, elc ethyl acetate fraction, clc chloroform fraction, blc butanol fraction, mlc methanol extract, alc aqueous fraction, rt rutin, asa ascorbic acid