. 2016 Apr 8;21(4):451. doi: 10.3390/molecules21040451
© 2016 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
Figure 2.
General structures of flavonoid subfamilies.