3H-Dibenz(f,ij)isoquinoline-1-carboxylic acid, 2,7-dihydro-3-methyl-6-((4-methyl-2-sulfophenyl)amino)-2,7-dioxo-, 1-ethyl ester, monoammonium salt 63149-14-4 Ammonium 1-ethyl 2,7-dihydro-3-methyl-6-((4-methyl-2-sulphonatophenyl)amino)-2,7-dioxo-3H-dibenz(f,ij)isoquinoline-1-carboxylate EINECS 263-958-0