. 2020 Nov 4;25(21):5133. doi: 10.3390/molecules25215133
© 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/).
Scheme 36.
Synthesis of compounds 183a–c and 182a–c.