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Dihydrogen -2-(4-((1-((o-anisidino)carbonyl)-2-oxopropyl)azo)-3-sulphophenyl)-4,7-disulpho-1H-naphtho(1,2-d)triazolium, sodium salt

Dihydrogen -2-(4-((1-((o-anisidino)carbonyl)-2-oxopropyl)azo)-3-sulphophenyl)-4,7-disulpho-1H-naphtho(1,2-d)triazolium, sodium salt