. 2010 Jan 7;15(1):226–232. doi: 10.3390/molecules15010226
© 2010 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 1.
Synthesis of hexamethyl compound 4.