2-氧代-环戊烷羧酸丁酯

ethyl 2-acetyloxy-8-oxobicyclo[3.2.1]octane-5-carboxylate

methyl 7-(1-bromo-2-oxocyclopentyl)heptanoate

ethyl 3-propan-2-ylcyclopentene-1-carboxylate

ethyl 2-hydroxy-3-propan-2-ylcyclopentane-1-carboxylate