. 2019 Aug 7;24(16):2862. doi: 10.3390/molecules24162862
© 2019 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 4.
1H–1H COSY and key HMBC correlations of 2.