ethyl 6-[(4-chloro-2-sulphophenyl)amino]-2,7-dihydro-3-methyl-2,7-dioxo-3H-dibenz[f,ij]isoquinoline-1-carboxylate

5-Chloro-2-[[[1-(ethoxycarbonyl)-3,7-dihydro-3-methyl-2,7-dioxo-2H-dibenz[f,ij]isoquinolin]-6-yl]amino]benzenesulfonic acid