1 H 　 NMR ( DMSO - d 6 , 400 MHz ) δ 10 . 30 ( s , 1 H ) , 9 . 65 ( s , 1 H ) , 9 . 13 ( s , 1 H ) , 7 . 75 ( br , 2 H ) , 7 . 66 ( s , 1 H ) , 6 . 98 ( d , J = 8 Hz , 2 H ) , 6 . 84 ( s , 1 H ) , 6 . 75 ( s , 1 H ) , 3 . 92 ( s , 3 H ) , 3 . 91 ( s , 3 H ) , 3 . 51 ( d , J = 8 Hz , 2 H ) , 2 . 93 - 2 . 88 ( m , 2 H ) , 2 . 50 - 2 . 49 ( m , 1 H ) , 2 . 15 ( t , J = 12 Hz , 2 H ) , 1 . 05 ( d , J = 8 Hz , 6 H ) ( 화합물 50 ) ;