Sodium salt of 1,2-diphenyl-4-N-sulphophenylhydrazono-3,5-dioxopydrazolidine;Benzenesulfonic acid, 4-((3,5-dioxo-1,2-diphenyl-4-pyrazolidinylidene)hydrazino)-, monosodium salt;LS-31906;19988-95-5
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