1 H NMR [ CDCl 3 , 300 MHz ] 1 . 41 - 1 . 46 ( 3 H , t , J = 7 . 54 Hz ) , 3 . 02 - 3 . 10 ( 2 H , q , J = 7 . 58 Hz ) , 3 . 37 ( 3 H , s ) , 6 . 61 - 6 . 62 ( 1 H , d , J = 3 . 99 Hz ) , 6 . 84 ( 1 H , s ) , 6 . 96 - 7 . 02 ( 2 H , t , J = 8 . 71 Hz ) , 7 . 21 - 7 . 24 ( 2 H , m ) , 7 . 45 - 7 . 49 ( 2 H , m ) , 7 . 96 - 8 . 02 ( 3 H , m ) . 수율 = 75 %.