. 2021 Jan 30;26(3):728. doi: 10.3390/molecules26030728
© 2021 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 3.
Chemical structures of alkaloids 1, 3–39.