. 2020 Apr 23;25(8):1970. doi: 10.3390/molecules25081970
© 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 2.
Previous synthetic approaches toward DHPV.