. 2019 Apr 18;24(8):1533. doi: 10.3390/molecules24081533
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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 (http://creativecommons.org/licenses/by/4.0/).
Scheme 12.
[2 + 2] Photocycloaddition of enones.