. 2012 Aug 24;17(9):10046–10051. doi: 10.3390/molecules170910046
© 2012 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.
Key 2D NMR correlations of compounds 1 and 2.