acetic acid,4-(oxan-2-yloxy)cyclopent-2-en-1-ol

Cis-3,5-二乙酰氧基-1-环戊烯

acetic acid,cyclopent-4-ene-1,3-diol

醋酸乙烯酯

顺式-4-环戊烯-1,3-二醇