. 2019 Nov 29;7:812. doi: 10.3389/fchem.2019.00812
Copyright © 2019 Wang, Chen, Wang, Huang, Cai, Yuan, Zhu, Xu, Mei and Dai.
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Figure 2.
Key HMBC (
) and 1H–1H COSY (−) correlations of compounds 1–4.