2,3,7,7a-四氢-4,7a-二甲基-1H-茚-1,5(6H)-二酮

3,8-癸烷二酮

1-diphenylphosphorylpentan-3-one

3-hydroxy-4,7a-dimethyl-6,7-dihydro-3H-2-benzofuran-1,5-dione

diethyl 2-(3-oxopentyl)propanedioate