octane-2,4,6-trione

乙基2-重氮基丙酸酯

1,3-dimethyl-4-phenylpyridin-2-one

1,3-dimethyl-4-phenyl-3,4-dihydro-2-pyridone

1,3-dimethyl-4-phenyl-5,6-dihydropyridin-2(1H)-one