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. 2017 Mar 27;17:171. doi: 10.1186/s12906-017-1699-y

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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 — HPLC chromatogram of a standard mixture of polyphenolic compounds (peak 1: gallicacid, 2:(+)-catechin, 3:vanillic acid 4: caffeic acid 5: (−)-epicatechin 6: p-coumaric acid 7: rutin hydrate 8: ellagic acid 9: myricetin, 10: quercetin, 11: kaempferol)