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Certified Reference Standards...
Chemical Name: 3',5-Dimethyl-3,5'-dioxo-1',2-diphenyl-1',2,3,5'-tetrahydro-[4,4'-bipyrazolylidene] 1-oxide
Smiles: O=C(N(C1=CC=CC=C1)N=C/2C)C2=C3C(N(C4=CC=CC=C4)[N+]([O-])=C\3C)=O