3-[[3-[(4-acetamidophenyl)sulfonylamino]-1,4-dihydroquinoxalin-2-yl]imino]-6-oxo-1-cyclohexa-1,4-dienecarboxylic acid
3-[[3-[(4-acetamidophenyl)sulfonylamino]-1,4-dihydroquinoxalin-2-yl]imino]-6-oxo-1-cyclohexa-1,4-dienecarboxylic acid