1 H NMR [ CDCl 3 , 300 MHz ] 8 . 02 ( m , 3 H ) , 7 . 64 - 7 . 54 ( m , 3 H ) , 7 . 20 - 7 . 04 ( m , 2 H ) , 6 . 84 ( m , 1 H ) , 6 . 63 ( dd , 1 H , J = 1 . 6 , 5 . 4 Hz ) , 3 . 37 ( s , 3 H ) , 3 . 09 - 3 . 01 ( q , 2 H , J = 7 . 6 Hz ) , 1 . 46 ( t , 3 H , J = 7 . 6 Hz ) . 수율 = 78 %.