. 2020 Dec 12;25(24):5885. doi: 10.3390/molecules25245885
© 2020 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.
Chemical structures of compound 1, 2, and 3.