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. 2021 Mar 25;11:601751. doi: 10.3389/fphar.2020.601751

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Copyright © 2021 Zhang, Zhang, Zhang, Sun and Sun.

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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(A) Panax notoginseng F. H. Chen (B and C) Structure skeletons of 20(S)-protopanaxatriol and 20(S)-protopanaxadiol that exist in raw and processed Panax notoginseng.