2-(3,3-dimethyl-2-oxobutyl)cyclopentan-1-one

2,2,7,7-四甲基-3,6-辛烷二酮

2-氰基环戊酮

甲基7-(5-氧代-1-环戊烯-1-基)庚酸酯

2-(cyclopenten-1-yl)ethenylbenzene