tetrasodium 4-amino-5-hydroxy-6-[[2-methoxy-5-methyl-4-[[8-[(phenylsulphonyl)oxy]-3,6-disulphonato-1-naphthyl]azo]phenyl]azo]naphthalene-2,7-disulphonate;4-Amino-5-hydroxy-6-[[2-methoxy-5-methyl-4-[[8-[(phenylsulfonyl)oxy]-3,6-disulfo-1-naphthalenyl]azo]phenyl]azo]-2,7-naphthalenedisulfonic acid tetrasodium salt
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