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. 2015 Mar 10;10(3):e0120221. doi: 10.1371/journal.pone.0120221

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© 2015 Serratos et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 1 — QUIN and its conversion to a dianionic stucture (pK1 = 2.43 and pK2 = 4.78) [40] at pH 7.4. Each structure was built up with the program ACD/ChemSketch Freeware (http://www.acdlabs.com/resources/freeware/chemsketch/).