. 2009 May 6;14(5):1713–1724. doi: 10.3390/molecules14051713
© 2009 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/).
Figure 1.
Structures of compounds 1-7.