5-methyl-1-phenylpyrazol-4-ol

3-ethyl-4-hydroxy-5-methyl-1-phenylpyrazole

4-hydroxy-3,5-dimethyl-1-phenylpyrazole

1,5-diphenylpyrazol-4-ol

4-hydroxy-5-methyl-3-propyl-1-phenylpyrazole