“…: 182–185°C (Lit. : 185–186°C); IR (KBr, cm −1 ): 3065, 2960, 1714, 1650, 1465, 1349, 1142, 771., 1 H NMR (300 MHz, CDCl 3 ): 1.35 (3H, s, CH 3 ), 1.36 (3H, s, CH 3 ), 2.39 (3H, s, CH 3 ), 3.26 (2H, s, CH 2 ), 5.31 (1H, s, CH), 7.52 (1H, d, J = 8.7 Hz, ArH), 7.71 (1H, t, J = 7.5 Hz, ArH), 7.82 (1H, dt, J = 7.6 Hz, J = 1.5 Hz, ArH), 8.21–8.27(2H, m, ArH), 8.33 (1H, s, ArH), 8.71 (1H, dd, J = 7.9 Hz, J = 1.2 Hz, ArH).…”