1,4,7,10,13,16-hexaoxacyclooctadecane-2,5,9-trione

1,4,7,10,13-pentaoxa-16-thiacyclooctadecane-3,14,17-trione

1,4,7,10,13,16,22,25-octaoxa-19,28-diazacyclotriacontane-3,14,18,29-tetrone

1,4,7,10-tetraoxacyclotridecane-11,13-dione

1,4,7,10,14,17,20,23-octaoxacyclohexacosane-11,13,24,26-tetrone