“…Fenoprofen concentrations in plasma were measured by GLC analysis of hexane extracts of deproteinized plasma (Nash, Bopp & Rubin, 1971); total [14C] -fenoprofen equivalents and non-metabolized fenoprofen were assayed in urine, Present address: Department of Pharmacology, University of Copenhagen, 20 Juliane Mariesvej, DK-2100 Copenhagen, Denmark. and in hexane extracts of urine, respectively, by liquid scintillation spectroscopy (Rubin, Rodda, Warrick, Ridolfo & Gruber, 1972a, Rubin, Warrick, Wolen, Chernish, Ridolfo & Gruber, 1972b.…”