. 2013 Aug 19;18(8):9966–9981. doi: 10.3390/molecules18089966
© 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 2.
The chemical structures of triterpenes of GLK.