1,3-Benzenedicarboxamide, N,N'-bis(2-hydroxy-1-(hydroxymethyl)ethyl)-5-((2-hydroxy-1-oxopropyl)amino)-2,4,6-triiodo-
(S)-N,N'-bis(2-hydroxy-1-(hydroxymethyl)ethyl)-2,4,6-triiodo-5-lactamidoisophthalamide