N1-(1,3-dihydroxypropan-2-yl)-N3-(2,3-dihydroxypropyl)-5-(2-hydroxy-N-methylacetamido)-2,4,6-triiodoisophthalamide

This compound is a triiodinated benzene derivative used as an impurity reference standard for the contrast agent iomeprol. It is characterized by multiple hydroxyl and amide functional groups, reflecting its role in pharmaceutical quality control.