1-phenyl-3-methyl-4-(4-chlorophenylhydrazo)-5-pyrazolone

2-phenylamino-2-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)ethanenitrile

2-(4-methylphenylamino)-2-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)ethanenitrile

1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-2-methylprop-2-en-1-one