1,4,7,10,13,16-hexaoxacyclooctadecane-2,6,11,15-tetrone

1,4,7-trioxacyclononane-2,6-dione

1,4,7,10,13,16,19,22,25-nonaoxacycloheptacosane-2,6,11,15,20,24-hexaone

1,4,7,10,13,16,19,22,25,28,31,34-dodecaoxacyclohexatriacontan-2,6,11,15,20,24,29,33-octaone

1,4,10,13-tetraoxacyclooctadecane-5,9,14,18-tetrone