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. 2017 Sep 7;22(9):1475. doi: 10.3390/molecules22091475

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© 2017 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/).

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Scheme 4 — (a) The oxidation reaction of benzaldehyde catalyzed by β-CD; (b) the proposed mechanism of the oxidation reaction of benzaldehyde to benzoic acid.