2-((2,7-DIHYDRO-3-METHYL-2,7-DIOXO-3H-NAPHTHO(1,2,3-DE)QUINOLIN-6-YL)AMINO)-5-METHYLBENZENESULFONIC ACID
2-((2,7-dihydro-3-methyl-2,7-dioxo-3h-naphtho(1,2,3-de)quinolin-6-yl)amino)-5-methylbenzenesulfonic acid