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. 2015 Sep 10;5(3):475–488. doi: 10.3390/metabo5030475

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© 2015 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 license (http://creativecommons.org/licenses/by/4.0/).

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Oxidation of 4-OHE₁-1-d to E₁-3,4-Q-1-d and subsequent reaction with dG. (A) Reverse phase C-18 HPLC analysis after 1 h (B) Reverse phase C-18 HPLC analysis after 4 h (C) TOF-MS analysis of the early eluting peak in the positive ion mode.