. 2013 Nov 8;18(11):13823–13830. doi: 10.3390/molecules181113823
© 2013 by the authors; licensee MDPI, 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.
Chemical structures of isolated compounds.