5-methyl-4-[(5-methyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)-(4-nitrophenyl)methyl]-2-phenyl-1H-pyrazol-3-one

3-methyl-1,6-diphenylpyrano[2,3-c]pyrazol-4-one

4-(2-chloroacetyl)-5-methyl-2-phenyl-1H-pyrazol-3-one