. 2019 Aug 31;24(17):3173. doi: 10.3390/molecules24173173
© 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/).
Scheme 5.
Schematic representation of ligands L4–L6.