1 H NMR [ CDCl 3 , 300 MHz ] 8 . 01 ( d , 1 H , J = 5 . 2 Hz ) , 7 . 88 ( d , 2 H , J = 7 . 5 Hz ) , 7 . 61 - 7 . 51 ( m , 3 H ) , 7 . 41 - 7 . 24 ( m , 4 H ) , 6 . 66 ( d , 1 H , J = 5 . 4 Hz ) , 3 . 3 ( m , 1 H ) , 2 . 0 ( d , 1 H ) , 1 . 8 ( m , 2 H ) , 1 . 4 ( m , 2 H ) , 1 . 2 ( m , 3 H ) , 1 . 14 ( m , 2 H ) . 수율 = 50 %.