. 2021 Aug 6;26(16):4777. doi: 10.3390/molecules26164777
© 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 (https://creativecommons.org/licenses/by/4.0/).
Figure 6.
COSY and 1H-NMR spectra of compound 13.