1 H NMR ( CDCl 3 , 300 M Hz ) 1 . 41 ( t , 3 H , J = 7 . 59 Hz ) , 2 . 32 ( s , 3 H ) , 3 . 03 ( q , 2 H , J = 7 . 59 Hz ) , 3 . 37 ( s , 3 H ) , 6 . 59 ( dd , 1 H , J = 1 . 56 & 6 . 9 Hz ) , 6 . 89 ( s , 1 H ) , 7 . 11 ( m , 3 H ) , 7 . 39 ( s , 1 H ) , 7 . 56 ( m , 3 H ) , 7 . 92 ( d , 1 H , J = 5 . 3 Hz ) , 8 . 0 ( dd , 2 H , J = 1 . 59 & 8 . 46 Hz ) . 수율 = 56 %.