1,2-双(二氯膦)-1,2-二甲基肼

1,2,5-trimethyl-1,2-dihydro-3H-pyrazol-3-one

2,4-dimethyl-5-phenyl-1H-pyrazol-3-one

(E)-methyl 3-(1,2-dimethylhydrazinyl)but-2-enoate

3-phenyl-1,2,4-trimethylpyrazolin-3-one