. 2020 Nov 2;25(21):5092. doi: 10.3390/molecules25215092
© 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 3.
Structures of 2-pyridyl analogues 80 and 81.