6-Amino-2-(2,4-dimethylphenyl)-2,3-dihydro-1,3-dioxo-1H-benzo[de]isoquinoline-5-sulfonic acid

6-amino-2-(2,4-dimethylphenyl)-2,3-dihydro-1,3-dioxo-1H-benz[de]isoquinoline-5-sulphonic acid