1 H NMR [ CDCl 3 , 300 MHz ] 8 . 0 ( m , 3 H ) , 7 . 93 - 7 . 53 ( m , 3 H ) , 7 . 41 - 7 . 29 ( m , 2 H ) , 7 . 10 - 6 . 96 ( m , 3 H ) , 6 . 65 ( m , 1 H ) , 3 . 79 - 3 . 76 ( m , 1 H ) , 3 . 50 - 3 . 48 ( m , 1 H ) , 2 . 33 ( m , 1 H ) , 2 . 14 - 2 . 01 ( m , 2 H ) , 1 . 75 ( m , 3 H ) . 수율 = 8 %.