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. 2019 Nov 12;19:309. doi: 10.1186/s12906-019-2694-2

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© The Author(s). 2019

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 — Chemical standardization of SMS (a) and its standard compounds (b) by high performance liquid chromatography (HPLC) fingerprint analysis (203 nm). In the HPLC fingerprint at an absorbance of 203 nm, the peaks corresponding to ginsenoside Re (1); ginsenoside Rg1 (2); ginsenoside Rb1 (3); schisandrin (4); ophiopogonin D (5); ruscogenin (6)