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. 2018 Sep 7;23(9):2290. doi: 10.3390/molecules23092290

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© 2018 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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Fluorescence photographs of compounds (a) 5a, (b) 5b, (c) 5c, (d) 5d, (e) 5e and (f) 5f in CH₃OH/H₂O mixtures (with various water fractions) under a 365 nm UV excitation (c = 2.09 × 10⁻⁵ M).