1-(1-环戊烯基)哌啶

4-(2-Oxocyclopentyl)-2-butennitril

4-(Spiro[cyclopentan-1,2'-[1,3]dioxolan]-2-yl)-2-butennitril

环戊酮

2,3,4,5,5a,6,7,8-Octahydrocyclopent[b]azepin