Human O-sulfated metabolites of (-)-epicatechin and methyl-(-)-epicatechin are poor substrates for commercial aryl-sulfatases: Implications for studies concerned with quantifying epicatechin bioavailability

Saha S., Hollands W., Needs P. W., Ostertag L. M., de Roos B., Duthie G. G., Kroon P. A.. (2012)

Pharmacological Research, 65, 592-602