1. Ottaviani JI, Momma TY, Kuhnle GK, Keen CL, Schroeter H: Structurally related (-)-epicatechin metabolites in humans: assessment using de novo chemically synthesized authentic standards. Free Radic Biol Med. 2012 Apr 15;52(8):1403-12. doi: 10.1016/j.freeradbiomed.2011.12.010. Epub 2011 Dec 23. [PubMed:22240152 ]