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. 2018 Jul 30;9:818. doi: 10.3389/fphar.2018.00818

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Copyright © 2018 Xu, Liu, He, Zhao, Wang, Han and Guo.

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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Identification of major components of QX1 formula. Three parallel samples of QX1 formula were examined using UPLC–MS/MS. Data were collected and proceeded by software Masslynx 4.1. The positive (A) and negative (B) ion chromatograms of QX1 formula were shown as indicated.