tert-butyl 4-oxopentanoate

4-乙酰基-5-(3,4-二甲氧基苯基)四氢呋喃-2-酮

2-methyl-3-phenylsulfanyl-2H-furan-5-one

3-溴-5-甲基-5H-呋喃-2-酮

5-methyl-1,3-dihydro-1-benzazepin-2-one