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. 2018 Dec 4;9:1423. doi: 10.3389/fphar.2018.01423

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Copyright © 2018 Huang, Lan, Lu, Zhang, Zhang, Lou, Xu, Ren, Zhao, Sun, Li and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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HPLC chromatogram of DiDang Tang (DDT). (A) HPLC chromatograms of gallic acid, amygdalin, sennoside B, rhein-8-glucoside, sennoside A, emodin, chrysophanol, aloe-emodin and rhein with UV detection at 254 nm are shown. (B) HPLC chromatogram of DDT with UV detection at 254 nm is shown. (C) HPLC fingerprint chromatograms of 10 batches of DDT (S1–10) and the control fingerprint chromatogram (R) from the analysis of 10 batches of DDT using National Pharmacopeia Committee Chinese Medicine Fingerprint Similarity Evaluation System (2004A) Software with UV detection at 254 nm are shown.