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The title compound was prepared according to the general procedure for the synthesis of N-Aryl-benzenesulfonamides previously described using (2-amino-5-chloro-phenyl)-(2-methyl-pyridin-3-yl)-methanone and 4-isopropoxy-benzenesulfonyl chloride and purified by HPLC. 1H NMR (CDCl3) δ 10.63 (br s, 1H, NH), 8.63 (dd, 1H, J=4.8 Hz, J=1.8 Hz), 7.79 (d, 1H, J=8.8 Hz), 7.71 (d, 1H, J=8.8 Hz), 7.48 (dd, 1H, J=9.0 Hz, J=2.2 Hz), 7.27 (dd, 1H, J=7.7 Hz, J=1.8 Hz), 7.19 (dd, 1H, J=7.7 Hz, J=4.8 Hz), 7.14 (d, 1H, J=2.2 Hz), 4.55 (septet, 1H, J=6 Hz), 2.35 (s, 3H), 1.35 (d, 3H, J=6 Hz). MS: m/z 445 (M+1).

1. custompurified by HPLC