1 H NMR ( 400 MHz , DMSO - d 6 ) : δ [ ppm ] = 1 . 15 ( s , 6 H ) , 3 . 32 - 3 . 35 ( m , 2 H 및 물 신호 ) , 3 . 93 ( s , 3 H ) , 4 . 70 ( s , 1 H ) , 7 . 58 - 7 . 62 ( m , 2 H ) , 8 . 07 - 8 . 13 ( m , 3 H ) , 8 . 56 ( s , 1 H ) , 8 . 59 ( s , 1 H ) , 9 . 65 ( t , 1 H ) .