. 2008 Sep 3;13(9):2107–2113. doi: 10.3390/molecules13092107
© 2008 by the authors.
Licensee Molecular Diversity Preservation International, 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 2.
General synthesis of quaternary salts.