. 2018 Aug 22;23(9):2111. doi: 10.3390/molecules23092111
© 2018 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Figure 2.
Key HMBC correlations of compounds 1–5.