. 2020 Sep 25;21(19):7078. doi: 10.3390/ijms21197078
© 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 25.
Quaternary ammonium (+)-camphor derivatives.