Figure 3: Comparative HPLC Chromatograms. Selectivity representative chromatograms (A) blank plasma chromatogram and (B) Plasma spiked with tolmetin glycinamide (TG) at Rt-3.943 min, internal standard (IS) at Rt-4.932 min, tolmetin (Tol) at Rt-5.362 min and amtolmetin gauacil (Amtol) at Rt-8.117 min.