Trifluoroacetic acid → 3-{4-[Methyl-(1-methyl-2-phenylamino-1H-benzoimidazol-5-yl)-amino]-pyrimidin-2-ylamino}-benzenesulfonamide trifluoroacetic acid

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(1-Methyl-5-{methyl-[2-(3-sulfamoyl-phenylamino)-pyrimidin-4-yl]-amino}-1H-benzoimidazol-2-yl)-phenyl-carbamic acid tert-butyl ester hydrochloride was stirred in solution of 50% trifluoroacetic acid and methylene chloride and concentrated to give the title compound as a white solid. 1H NMR (300 MHz, d6-DMSO+NaHCO3) δ 10.32 (br s, 1H), 9.54 (br s, 1H), 8.49 (s, 1H), 7.86 (d, J=6.9 Hz, 1H), 7.73-7.78 (m, 3H), 7.47-7.54 (m, 3H), 7.34-7.41 (m, 4H), 7.06-7.14 (m, m 2H), 5.80 (d, J=6.6 Hz, 1H), 3.78 (s, 3H), 3.53 (s, 3H). MS (ESI) m/z=501 [M+H]+.

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