. 2019 Jun 5;24(11):2121. doi: 10.3390/molecules24112121
© 2019 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Figure 2.
Structures of cryptolepine derivatives.