1 H 　 NMR ( DMSO - d 6 , 400 MHz ) δ 10 . 42 ( s , 1 H ) , 9 . 68 ( s , 1 H ) , 9 . 18 ( s , 1 H ) , 7 . 82 ( br , 2 H ) , 7 . 69 ( s , 1 H ) , 7 . 04 ( d , J = 8 Hz , 2 H ) , 6 . 85 ( s , 1 H ) , 6 . 76 ( s , 1 H ) , 4 . 22 ( t , J = 6 Hz , 2 H ) , 3 . 93 ( s , 3 H ) , 3 . 81 ( s , 3 H ) , 3 . 29 ( t , J = 4 Hz , 2 H ) , 3 . 05 ( br , 4 H ) , 1 . 88 - 1 . 85 ( m , 4 H ) ( 화합물 28 ) ;