1 H NMR [ CDCl 3 , 300 MHz ] 8 . 04 ( d , 1 H , J = 7 . 1 Hz ) , 7 . 95 ( d , 1 H , J = 5 . 3 Hz ) , 7 . 63 - 7 . 64 ( m , 3 H ) , 7 . 40 ( d , 2 H , J = 8 Hz ) , 7 . 12 ( d , 2 H , J = 7 . 9 Hz ) , 6 . 90 ( s , 1 H ) , 6 . 0 ( dd , 1 H , J = 1 . 4 , 5 . 3 Hz ) , 3 . 38 ( s , 3 H ) , 3 . 10 ( q , 2 H , J = 7 . 6 Hz ) , 2 . 35 ( s , 3 H ) , 1 . 46 ( t , 3 H , J = 7 . 6 Hz ) . 수율 = 55 %.