. 2009 Aug 25;14(9):3142–3152. doi: 10.3390/molecules14093142
© 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.
Structural formulae of compounds 2.