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. Author manuscript; available in PMC: 2012 Jul 15.
Published in final edited form as: Free Radic Biol Med. 2011 Apr 22;51(2):454–463. doi: 10.1016/j.freeradbiomed.2011.04.032

Scheme I.

Scheme I

Structures of quercetin and its in vivo methyl, sulphate, glucuronide and phenolic acid metabolites.