18-ethyl-1,4,7,10,13,16-hexaoxacyclononadecane-17,19-dione

18-phenyl-1,4,7,10,13,16-hexaoxacyclononadecane-17,19-dione

1,2-bis[2-(2-iodoethoxy)ethoxy]ethane

1,4,7,10,13,16-六氧杂-19-氮杂环二十一烷

2-methyl-1,3,6,9,12,15-hexaoxacycloheptadecane