N1-(3-(2,3-dihydroxypropoxy)-2-hydroxypropyl)-N3-(2,3-dihydroxypropyl)-5-(N-(2,3-dihydroxypropyl)acetamido)-2,4,6-triiodoisophthalamide; 5-[Acetyl(2,3-dihydroxypropyl)amino]-N-[3-(2,3-dihydroxypropoxy)-2-hydroxypropyl]-N′-(2,3-dihydroxypropyl)-2,4,6-triiodobenzene-1,3-dicarboxamide; Iodixanol Impurity 5
