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- For compound 3a IR (KBr, cm−1): 1471, 1377, 829. 1H NMR (400 MHz,CDCl3, ppm) δ: 7.79 (s, 1H, =CH), 7.70 (m, 2H, Ar-H), 7.39 (m, 2H, Ar-H), 4.23 (s, 3H, CH3). Anal. calcd. for C9H8N3Cl: C 55.83, H 4.16, N 21.70. Found: C 55.69, H 4.01, N 21.45. For compound 3o. IR (KBr, cm−1): 2923, 2853, 1614, 1547, 1495, 1453, 1376, 1030, 997, 830. 1H NMR (400 MHz,CDCl3, ppm) δ: 8.09 (m, 2H, Ar-H), 8.00 (s, 1H, =CH), 7.84 (m, 2H, Ar-H), 7.48 (m, 2H, Ar-H), 7.02 (m, 2H, Ar-H), 3.89 (s, 3H, CH3O). Anal. calcd. for C15H12N3Cl: C 66.79, H 4.45, N 15.58. Found: C 66.62, H 4.41, N 15.52