. 2008 Aug 28;13(8):1931–1941. doi: 10.3390/molecules13081931
© 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/).
Figure 1.
The structures of compounds 1-16.