... -Crown 6-EtherMolecular Formula C12H24O6 Molecular Weight 264.32 CAS Registry Number 17455-13-9 EINECS 241-473-5 Name 18-Crown ... -6Synonyms 1,4,7,10,13,16-Hexaoxacyclooctadecane; Hexaoxacyclo-octadecane; 18-Crown 6-ether Molecular Structure ... Molecular Formula C12H24O6Molecular Weight 264.32CAS Registry Number 17455-13-9EINECS 241-473-5 18-Crown 6-Ether