. 2020 Feb 17;25(4):888. doi: 10.3390/molecules25040888
© 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.
Side products of the reaction between 1 and 4.