4-(乙酰氧基)-2-环戊烯-1-酮

2-环亚戊基环戊酮

(4R)-4-hydroxy-4-(3-iodoprop-2-enyl)cyclopent-2-en-1-one

4-hydroxy-4-(3-phenylprop-2-ynyl)cyclopent-2-en-1-one

(R)-4-oxocyclopenten-2-enyl 2-phenylacetate