Synonyms: 1,10-Diaza-18-crownether;1,10-Diaza-18-crown-6;1,10-Diaza-4,7,13,16-tetraoxa-18-crown-6;1,10-Diaza-4,7,13,16-tetraoxacyclooctadecane;1,7,10,16-Tetraoxa-4,13-diazacyclooctadecane;2,2'-Kryptofix;4,13-Diaza-18-crown-6;4,7,13,16-Tetraoxa-1,10-diazacyclooctadecane;7,16-Diaza-1,4,10,13-tetraoxacyclooctadecane;7,16-Diaza-18-crown-6;Cryptand22;Cryptand(2.2);Crytand[2,2];Diaza crown ether 22;Diaza-18-crown-6;Kryptand[2.2];Kryptofix 22;Kryptofix[2.2];NSC 339325;