1 H NMR [ CDCl 3 , 300 MHz ] 8 . 04 ( m , 2 H ) , 7 . 56 ( d , 2 H , J = 11 . 3 Hz ) , 7 . 59 ( m , 3 H ) , 7 . 25 ( m , 2 H ) , 6 . 95 ( m , 2 H ) , 6 . 79 ( m , 2 H ) , 3 . 84 ( s , 3 H ) , 3 . 33 ( m , 4 H ) , 1 . 96 ( m , 2 H ) , 1 . 27 ( m , 3 H ) . 수율 = 40 %.