1 H NMR [ CDCl 3 , 300 MHz ] 8 . 02 ( d , 3 H , J = 6 . 9 Hz ) , 7 . 85 ( s , 1 H ) , 7 . 66 ( t , 2 H , J = 7 . 1 Hz ) , 7 . 59 ( t , 3 H , J = 7 . 4 Hz ) , 7 . 43 ( t , 1 H , J = 7 . 7 Hz ) , 6 . 85 ( s , 1 H ) , 6 . 6 ( d , 1 H , J = 4 . 3 Hz ) , 3 . 36 ( s , 3 H ) , 3 . 12 ( q , 2 H , J = 7 . 5 Hz ) , 1 . 48 ( t , 3 H , J = 7 . 5 Hz ) . 수율 = 52 %.