Cycloalkylamines are molecules which contain a cycloalkyl group and an amine in their structure. Cycloalkyl groups are derived from cycloalkanes by removal of a hydrogen atom from a ring carbon atom. Amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. The acyclic part of cycloalkylamines is equal to that of methamphetamine. The difference is that methamphetamine is an aromatic molecule with a phenyl ring whereas cycloalkylamines are aliphatic and contain no delocalized electrons.