4,13-Diaza-18-crown-6-ether1,4,10,13-tetraoxa-7,16-diazacyclooctadecane1,4,10,13-Tetraoxa-7,16-diazacyclooctadecane1,10-偶氮-18-冠-61,10-Diaza-18-crown-61,4,10,13-四氧杂-7,16-二氮杂环十八烷1,10-二氮杂-18-冠-61,10-Diaza-18-crown-61,4,10,13-Tetraoxa-7,16-diazacyclooctadecane