1-(cyclopenten-1-yl)cyclohexa-2,4-diene-1-carbaldehyde

2-(3-oxo-3-phenylpropyl)cyclopentan-1-one

2-(1-氧代丙基)环戊烷-1-酮

2-氧代环戊羧酸烯丙酯

2-(cyclopent-2-ene-1-carbonyl)cyclopentan-1-one