1 H NMR [ CDCl 3 , 300 MHz ] 8 . 04 ( m , 3 H ) , 7 . 36 - 7 . 31 ( m , 1 H ) , 7 . 24 - 7 . 21 ( m , 2 H ) , 7 . 09 ( m , 1 H ) , 6 . 83 ( s , 1 H ) , 6 . 65 ( dd , 1 H , J = 1 . 4 , 5 . 3 Hz ) , 3 . 37 ( s , 3 H ) , 3 . 10 ( q , 2 H , J = 7 . 6 Hz ) , 1 . 46 ( t , 3 H , J = 7 . 6 Hz ) . 수율 = 68 %.