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. 2018 Dec 10;13:61. doi: 10.1186/s13020-018-0217-6

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© The Author(s) 2018

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 — The typical HPLC chromatogram of Fukeqianjin formula. a Mixed standard reference substance. 1: chlorogenic acid (10.163 min); 2: ferulic acid (20.775 min); 3: lobetyolin (26.385 min); 4: andrographolide (31.671 min); 5: dehydrated andrographolide (44.164 min). b Fukeqianjin formula extract (0–50 min). c Fukeqianjin formula extract (8–25 min)