1 H NMR [ CDCl 3 , 300 MHz ] 8 . 02 ( d , 1 H , J = 5 . 4 Hz ) , 7 . 9 - 7 . 88 ( m , 2 H ) , 7 . 65 - 7 . 52 ( m , 3 H ) , 7 . 46 - 7 . 29 ( m , 4 H ) , 7 . 10 - 7 . 04 ( m , 2 H ) , 7 . 01 - 6 . 96 ( m , 2 H ) , 6 . 67 ( dd , 1 H , J = 1 . 5 , 5 . 4 Hz ) , 3 . 6 ( m , 1 H ) , 1 . 4 ( d , 3 H , J = 7 . 5 Hz ) , 1 . 1 ( d , 3 H , J = 7 . 5 Hz ) . 수율 = 60 %.