dimethyl 2,5-dimethylidenehexanedioate

tricyclo<4.2.2.0>dec-3-ene

<4.2.2>propella-3,5-diene

bicyclo<2.2.0>hexane-1,4-bis(acetonitrile)

bicyclo<2.2.0>hexane-1,4-bis(acetaldehyde)