. 2016 Mar 9;21(3):326. doi: 10.3390/molecules21030326
© 2016 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
Scheme 2.
Synthesis of bis-pyrrole derivatives 5b–e.