1 H NMR [ CDCl 3 , 300 MHz ] 7 . 91 - 7 . 88 ( m , 3 H ) , 7 . 61 - 7 . 52 ( m , 6 H ) , 7 . 29 ( s , 2 H ) , 6 . 87 ( s , 1 H ) , 6 . 54 ( dd , 1 H , J = 1 . 6 , 5 . 3 Hz ) , 3 . 8 ( t , 1 H , J = 8 . 0 Hz ) , 3 . 1 ( q , 2 H , J = 7 . 5 Hz ) , 2 . 29 ( m , 1 H ) , 2 . 18 ( m , 1 H ) , 1 . 75 ( m , 3 H ) , 1 . 46 ( t , 3 H , J = 7 . 5 Hz ) . 수율 = 41 %.