. 2009 Feb 27;14(3):939–952. doi: 10.3390/molecules14030939
© 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 isolated compounds 1-4.