1 H NMR ( 400 MHz , DMSO - d 6 ) : δ [ ppm ] = 1 . 18 ( d , 3 H ) , 1 . 75 - 1 . 89 ( m , 2 H ) , 2 . 36 - 2 . 45 ( m , 2 H ) , 2 . 46 - 2 . 59 ( m , 2 H 및 DMSO 신호 ) , 3 . 42 - 3 . 52 ( m , 2 H ) , 4 . 00 - 4 . 11 ( m , 1 H ) , 4 . 90 - 5 . 00 ( m , 2 H ) , 7 . 58 - 7 . 63 ( m , 2 H ) , 8 . 08 - 8 . 12 ( m , 2 H ) , 8 . 16 ( s , 1 H ) , 8 . 59 ( s , 1 H ) , 8 . 61 ( s , 1 H ) , 9 . 52 ( d , 1 H ) .