1 H NMR [ CDCl 3 , 300 MHz ] 1 . 41 - 1 . 46 ( 3 H , t , J = 7 . 54 Hz ) , 3 . 03 - 3 . 10 ( 2 H , q , J = 7 . 54 Hz ) , 3 . 33 - 3 . 37 ( 3 H , s ) , 6 . 60 - 6 . 62 ( 1 H , dd , J = 1 . 56 Hz , J = 5 . 35 Hz ) , 6 . 86 - 6 . 87 ( 1 H , d , J = 0 . 93 Hz ) 6 . 96 - 7 . 02 ( 1 H , m ) , 7 . 22 - 7 . 25 ( 2 H , m ) , 7 . 54 - 7 . 63 ( 3 H , m ) , 7 . 97 - 8 . 02 ( 3 H , m ) . 수율 = 49 %.