N,N-dimethyl-N'-(2,4,6-triiodo-3-morpholin-4-ylmethyl-phenyl)-formamidine
N'-(3-{[Bis-(2-hydroxy-ethyl)-amino]-methyl}-2,4,6-triiodo-phenyl)-N,N-dimethyl-formamidine
N'-{3-[(2-Hydroxy-1-hydroxymethyl-1-methyl-ethylamino)-methyl]-2,4,6-triiodo-phenyl}-N,N-dimethyl-formamidine
N'-(3-Cyclohexylaminomethyl-2,4,6-triiodo-phenyl)-N,N-dimethyl-formamidine
N,N-Dimethyl-N'-(2,4,6-triiodo-3-{[methyl-((2S,3R,4R,5R)-2,3,4,5,6-pentahydroxy-hexyl)-amino]-methyl}-phenyl)-formamidine