. 2019 Aug 21;24(17):3032. doi: 10.3390/molecules24173032
© 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 11.
Resonance effect of compounds E, F.