129984-40-3 Cuprate(2-), (4-((4-amino-2-hydroxy-3-((4-nitrophenyl)azo)-5-((4-((4-nitro-2-sulfophenyl)amino)phenyl)azo)phenyl)azo)-3-hydroxy-7-nitro-1-naphthalenesulfonato(4-))-, disodium