. 2021 Oct 13;22(20):11033. doi: 10.3390/ijms222011033
© 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 3.
UV/VIS spectra of compounds (2a, 2b, 2e–2g).