1H-NMR (300 MHz, DMSO-d6): δ 9.12 (d, J = 2.0 Hz, 1H, Ar-H), 8.31 (dd, J = 9.0, 2.0 Hz, 1H, Ar-H), 8.10 (d, J = 9.0 Hz, 1H, Ar-H), 2.89 (s, 3H, C-CH3). 13C-NMR (300 MHz, DMSO-d6): δ 175.09, 157.25, 144.54, 136.40, 122.77, 121.86, 119.60, 20.72. IR (ATR): 3066, 2995, 1601, 1569, 1503, 1434, 1329, 1268, 1174, 1117, 993, 903, 821, 749, 671. GC-MS (EI) m/z: 193.95 ([M-H]+).