. 2008 Oct 1;13(10):2394–2407. doi: 10.3390/molecules13102394
© 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/).
Scheme 2.
