. 2009 Aug 3;14(8):2857–2861. doi: 10.3390/molecules14082857
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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 3.
Synthesisof 1 and 2.