1-[2-[2-(2-chloroethoxy)ethoxy]ethoxy]-2-[2-[2-[2-(2-chloroethoxy)ethoxy]ethoxy]ethoxy]ethane

1,4,7,13-Tetraoxa-10,16-diazacyclooctadecane

1,4,7-trioxa-10,13,16-trithiacyclooctadecane