ethyl 1-(5-bromopentyl)-2-oxocyclopentane-1-carboxylate

2-(5-bromopentyl)cyclopentan-1-one

2-(4-bromobutyl)cyclopentan-1-one

4-(2-oxocyclopentyl)butyl-triphenylphosphanium,bromide

4-氯-2-甲基磺酰基-6,7-二氢-5H-环戊并嘧啶