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. 2022 Jan 25;12:799504. doi: 10.3389/fphar.2021.799504

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Copyright © 2022 Deng, Kang, Kang, Lyu, Zhang, Wang, Wang, Nan, Zhou, Huang, Zhan 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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Structure determination of compound 1, 3 and chemical transformation mechanism in sulfuring process. Key heteronuclear multiple bond correlations (HMBCs) of compound 3 (A); Δδ values (Δδ = δ_S − δ_R) obtained from the methyl-α-trifluoromethylphenyl lactic acid (MTPA) esters of compound 3 (B); ¹H NMR (marked red) and ¹³C NMR (marked blue) values of compound 1 and compound 3 (C); Chemical transformation mechanism in sulfuring (D).