1,4,7-trioxacycloheptadecane-8,17-dione

1,4,7,12,15,18-六氧杂环二十二烷-8,11,19,22-四酮

1,4,7-三氧杂环十一烷-8,11-二酮

1,4,7,10,13,16,19,22-octaoxacyclotetracosane-2,6,14,18-tetrone

2-[2-[2-[2-[2-(carboxymethoxy)acetyl]oxyethoxy]ethoxy]-2-oxoethoxy]acetic acid