BIS(3-METHYL-1-PHENYL-5-PYRAZOLONE), bis-pyrazolone, 3,3'-dimethyl-1,1'-diphenyl-4,4'-bi-4H-pyrazole-5,5'(1H,1'H)-dione, 4,4'-bis-(1-phenyl-3-methyl-2-pyrazolin-5-one), 3,3'-Dimethyl-1,1'-diphenyl-(4,4'-bi-2-pyrazoline)-5,5'-dione, 3,3'-dimethyl-1,1'-diphenyl-4,4'-bi-5-pyrazolone, edaravone diMer, BIS(1-PHENYL-3-METHYL-5-PYRAZOLONE), 5,5'-dimethyl-2,2'-diphenyl-1,2,1',2'-tetrahydro-[4,4']bipyrazolyl-3,3'-dione, edaravone related substance A, bis-4,4'-(3-methyl-5-oxo-1-phenylpyrazole), Bis(1-phenyl-3-methyl-5-pyrazo