• 3-methyl-5-pyrazolone2021-12-27
• 1-(2-chlorophenyl)-3-methyl-5-pyrazolone2021-12-27
• 1-(4-sulfophenyl)-3-methyl-5-pyrazolone2021-12-27
• 1-phenyl-3-methyl-5-pyrazolone2021-12-27