“…IR (cm -1 , KBr): 3057, 2930, 2852, 1730, 1590, 1487. 1 H NMR (CDCl3, 500 MHz) (ppm): 7.98 (dd, J = 7.5, 1.5 Hz, 1H),7.94 (dd, J = 7.5, 2.0 Hz, 1H),7.83 (dd, J = 8.0, 1.5 Hz, 1H),7.59 -7.50 (m,4H),7.43 (s, 1H), 7.21 (d, J = 8.0 Hz, 1H),7.28 (t, J = 7.5 Hz, 1H),7.20 (d, J = 7.5 Hz, 1H), 2.38 (s, 3H); 13…”