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. 2021 Apr 1;12:627458. doi: 10.3389/fphar.2021.627458

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Copyright © 2021 Tang, Yan, Wang, Xu, Peng, Ao and Tan.

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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The ratio of TMPs and natural products. (A): ratio of TMPs in this article (classified by family); (B): ratio of natural products in this article (classified by compound type).