“…H NMR (300 MHz, CDCl 3 , δ ppm): 7.37-7.42(m, 1H), 7.45-7.56(m, 3H),7.59-7.66(m, 3H), 7.68-7.71(m, 1H),7.94-7.96(m, 2H);13 C NMR (75.5 MHz, CDCl 3 , δ ppm): 116.7, 119.9, 125.9, 128.6, 128.7, 129.6, 133.2, 133.6, 133.9, 135.6, 139.1, 157.3, 192.3, 193.6; IR (KBr) (ν max, cm −1 ) :1246, 1604, 1662, 3032, 3052 cm −1 ; MS: m/z = 266 (M + ). Anal.…”