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

2-(4-carbethoxybutyl)cyclopent-2-en-1-one

acetic acid,[2-(5-hydroxypentyl)cyclopenten-1-yl] acetate

2-bromo-2-(6-ethoxycarbonylhexyl)cyclopentan-1-one

7-溴庚酸乙酯