. 2022 Aug 12;27(16):5135. doi: 10.3390/molecules27165135
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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/).
Scheme 1.
Synthetic pathway for 7–9 compounds.