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. 2021 Mar 21;26(6):1753. doi: 10.3390/molecules26061753

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© 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 (http://creativecommons.org/licenses/by/4.0/).

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UV-visible absorption spectra of the investigated compounds based on coumarin derivatives in ACN: (1) CoumA, (2) CoumB, (3) CoumC, (4) CoumD, (5) CoumE, (6) CoumF, (7) CoumG, (8) CoumH, and (9) CoumI.