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. 2013 Nov 21;8(11):e81258. doi: 10.1371/journal.pone.0081258

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© 2013 Li et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A and B: HPLC with different solvent conditions was carried out to establish the purity of saponin 1 on a Dionex P680 liquid chromatograph equipped with a UV170 UV/Vis detector using a YMC-Pack R&D ODS-A column (20×250 mm, YMC Co., Ltd). C: Chemical structure of saponin 1.