1,5,1',5'-Tetramethyl-2,2'-diphenyl-1,2,1',2'-tetrahydro-4,4'-salicyliden-bis-pyrazol-3-on;<2-Hydroxy-phenyl>-
-methan;Diantipyryl-(2-hydroxy-phenyl)-methan;o-Hydroxyphenyldiantipyrylmethan;4-[(1,5-Dimethyl-3-oxo-2-phenylpyrazol-4-yl)-(2-hydroxyphenyl)methyl]-1,5-dimethyl-2-phenylpyrazol-3-one