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. 2020 Apr 22;11:521. doi: 10.3389/fphar.2020.00521

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Copyright © 2020 Kim, Park, Haleem, Lee, Koo, Na, Song and Lee

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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20(S/R)-25-OCH₃-PPD metabolites. (A) 20(S)-25-OCH₃-PPD metabolized to 20(S)-25-OH-PPD. (B) 20(R)-25-OCH₃-PPD metabolized to 20(R)-PD (M1), and the oleanane triterpenoid saponin M2.