2-(3-氧代丁基)环己烷-1,3-二酮

2-methyl-2-prop-2-ynylcyclohexane-1,3-dione

2,4-dimethyl-7,8-dihydro-6H-quinolin-5-one

2-phenyl-6,7-dihydro-5H-1-benzofuran-4-one

3-phenyl-6,7-dihydrobenzofuran-4(5H)-one