cycloalkane s: cyclopropane , cyclobutane , cyclopentane , cyclohexane , cycloheptane , cyclooctane , cyclononane , cyclodecane , cycloundecane , cyclododecane , and so on. Bicyclic alkanes include bicycloundecane and decalin . Polycyclic alkanes include cubane , basketane , and housane . Spiro compound s have two or more rings that