N1,N3-bis(1,3-dihydroxypropan-2-yl)-5-(2-hydroxyacetamido)-2,4,6-triiodoisophthalamide;5-Amino-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodo- 1,3-benzenedicarboxamide; USP Iopamidol Related Compound B; Iopamidol EP Impurity B;Desmethyl Iopamidol
