. 2018 Jul 12;6:282. doi: 10.3389/fchem.2018.00282
Copyright © 2018 Luo, Yang, Chen, Lin, Chen, Zhou, Liu and Liu.
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Figure 2.
Key HMBC, 1H-1H COSY, and NOESY correlations of compounds 1–2, 13, 17–18, and 21.