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. 2018 Feb 12;10:3. doi: 10.3389/fnagi.2018.00003

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Copyright © 2018 Tewari, Stankiewicz, Mocan, Sah, Tzvetkov, Huminiecki, Horbańczuk and Atanasov.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Tautomerism of curcumin: (A) Diketo and 1,3-keto-enol equilibrium form of curcumin with its biologically relevant structural units. (B) Hydrogen transfer in the most stable enol form.