. 2012 Dec 10;17(12):14637–14650. doi: 10.3390/molecules171214637
© 2012 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 license (http://creativecommons.org/licenses/by/3.0/).
Scheme 3.
Synthesis of 3,4-dihydroxybenzoic acid esters.