1 H NMR [ CDCl 3 , 300 MHz ] 7 . 9 ( d , 1 H , J = 5 . 1 Hz ) , 7 . 8 ( d , 2 H , J = 7 . 2 Hz ) , 7 . 5 - 7 . 6 ( m , 3 H ) , 7 . 0 ( d , 2 H , J = 6 . 3 Hz ) , 6 . 8 ( s , 1 H ) , 6 . 7 ( m , 1 H ) , 6 . 5 ( t , 1 H , J = 1 . 2 , 3 . 9 Hz ) , 3 . 6 ( m , 1 H ) , 3 . 0 ( q , 2 H , J = 7 . 5 , 7 . 5 Hz ) , 1 . 4 ( t , 6 H , J = 7 . 5 , 7 . 5 Hz ) , 1 . 1 ( d , 3 H , J = 6 Hz ) . 수율 = 51 %.