Feces homogenates were processed by liquid extraction. After complete thawing and mixing from the feces homogenates, 2 g of samples was removed (15 min energetic trembling, then centrifugation for five min at 4009g) 3 occasions with 3 mL of methanol/acetonitrile/water/formic acidity (48/48/3.9/.1) and when with 3 mL of methanol/ acetonitrile/water/ammonium hydroxide (48/48/3.9/.1). The extracts were combined and concentrated within stream of CHIR-265 nitrogen to around 1 mL. The liquid deposits were moved into plastic vials, and solid deposits were removed with 2 mL of methanol following a short centrifugation, the supernatants were also moved into vials. The combined samples were reduced with nitrogen to around 1 mL. The typical extraction yield was 78% (range 69% to 86%). Sample aliquots (urine or feces) of 100 lL were quantitatively injected in to the HPLC with on-line recognition operated by Chromeleon, version 3.05 (Dionex, Idstein, Germany). Samples were examined on 150 9 4.6 mm ProC18 HD posts protected by 10 9 4 mm ProC18 RS guard posts (both 5 lm particle size YMC, Germany).

             Metabolites were separated having a gradient of aqueous ammonium acetate (.1 M, pH 8.5 adjustedwith ammonium hydroxide: mobile phase A) versus acetonitrile (mobile phase B) in a flow rate of just one. mL/min (gradient: 5% B at  min, linear to 25% B at 5 min, linear to 31% B at 25 min, linear to 55% B at 38 min, TAE684 linear to 95% B at 39 min with plateau at 95% B to 42 min). Having a signal-to-noise ratio S/N = 2, the recognition system was linear (r2 C .99) over the plethora of 329-374183 dpm (absolute amount injected on column), correspondingly, as evaluated by triplicate injections of [14C]-afatinib at various levels. The radioactivity of aliquots of urine or feces samples, rinsing solutions, eluates and reconstituted solutions for HPLC analysis was determined by liquid scintillation counting. Plasma analysis Plasma samples acquired at 1, 2 and 6 h after dental administration of [14C]-afatinib were processed by solid-phase extraction on Discovery DSC-18LT (2 g, 12 mL) tubes (Supelco, USA) preconditioned with 5 mL of acetonitrile and equilibrated with 10 mL water. Samples (*40 mL) were acidified with .1 M muriatic acidity (4 ? 1) and, after mixing and short centrifugation to get rid of any solids, were applied to the posts. After rinsing with 10 mL methanol/acetonitrile/water (90/10 v/v) and drying out, the absorbed material was BSI-201 eluted two times with 10 mL of methanol/acetonitrile/water (48.5/48.5/3), and also the combined eluates were concentrated within stream of nitrogen to near dryness. The liquid deposits were moved into plastic vials.

             and also the solid deposits were removed R406 two times with 1 mL of methanol/ water (90/10) then, after short centrifugation, the supernatants were also moved into vials. These combined samples were reduced to around 200 lL. The typical extraction yield was 103% (range 94% to 108%).