5-methyl-2-phenylpyrazole-3,4-dione

3,6-dimethyl-1-phenyl-5,6-dihydropyrano[2,3-c]pyrazol-4-one

3,5-dimethyl-1-phenyl-5,6-dihydropyrano[2,3-c]pyrazol-4-one

3,6,6-trimethyl-1-phenyl-5H-pyrano[2,3-c]pyrazol-4-one

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