3-(diethylamino)-3-oxopropanoyl chloride

1,3-bis(diphenylphosphanyl)propane-1,3-dione

1,4,7,11,14,17-hexaoxacycloicosane-8,10,18,20-tetrone

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

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