4,4'-双(3-氧代丁酰氨基)-1,1'-联苯

3-cyclohexyl-2-cyclohexylimino-6-methyl-1,3-oxazin-4-one

3-(2-oxopropyl)cyclohexan-1-one

3-氧代-丁酸-2-羟丙基酯

3-(1,3-二氧代丁基)恶唑烷-2-酮