. 2020 Jul 1;25(13):3013. doi: 10.3390/molecules25133013
© 2020 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 4.
Structures of calystegines A3, B2, and B4.