3H-Dibenz(f,ij)isoquinoline-1-carboxylic acid, 6-((4-chloro-2-sulfophenyl)amino)-2,7-dihydro-3-methyl-2,7-dioxo-, 1-ethyl ester 63149-10-0 EINECS 263-957-5 Ethyl 6-((4-chloro-2-sulphophenyl)amino)-2,7-dihydro-3-methyl-2,7-dioxo-3H-dibenz(f,ij)isoquinoline-1-carboxylate