methyl 3-isopropylidenecyclopentanecarboxylate

methyl 3,3-dimethyl-4-methylidenecyclopentane-1-carboxylate

2,2-dimethyl-3-methylidenecyclopentane-1-carbonitrile

3-propan-2-ylidenecyclopentane-1-carbonitrile

异丙亚基环戊烷