CAS: 7477-67-0 Molecular Formula: C20 H18 N4 O2 Molecular Weight (g/mol): 346.38 Synonym: 2,2',4,4'-Tetrahydro-5,5'-dimethyl-2,2'-diphenyl-[4,4'-Bi-3H-pyrazole]-3,3'-dione,3,3'-Dimethyl-1,1'-diphenyl-[4,4'-bi-2-pyrazoline]-5,5'-dione,4,4'-Bis(1-phenyl-3-methyl-5-pyrazolone),NSC 37393,NSC 401001,Edaravone dimer IUPAC Name: 5-methyl-4-(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)-2-phenyl-4H-pyrazol-3-one SMILES: CC1=NN(C(=O)C1C2C(=NN(C2=O)c3ccccc3)C)c4ccccc4