3-cyclopropylidenepropylbenzene

N,N-dimethyl-3-(triphenyl-λ⁵-phosphanylidene)propan-1-amine

cyclopropylidenemethylbenzene

1,1-dimethoxypropan-2-ylidenecyclopropane

3,3-diethoxybutan-2-ylidenecyclopropane