Iopromide73334-07-3100 % similar 5-Acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide31127-80-751 % similar Iohexol66108-95-050 % similar Iomeprol78649-41-948 % similar Iodixanol92339-11-248 % similar 5-Amino-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide76801-93-944 % similar Ioversol87771-40-242 % similar Iopamidol60166-93-033 % similar