2,7-Naphthalenedisulfonic acid, 4-((4-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-5-methoxy-2-methylphenyl)azo)-6-((phenylsulfonyl)oxy)- 68015-59-8 N-(4-Hydroxy-2-sulfo-7-naphthyl)-N'-(2-methoxy-5-methyl-4-((7-phenylsulfonoxy-3,6-disulfo-1-naphthyl)azo)phenyl)urea N-(4-Hydroxy-2-sulfo-7-naphthyl)-N'-(2-methoxy-5-methyl-4-(7-benzenesulfonoxy-3,6-disulfo-1-naphthylazo)phenyl)urea