(I-123)-Hipdm 2-(((3-(Dimethylamino)propyl)methylamino)methyl)-4-(iodo-123I)-6-methylphenol 84718-97-8 HIPDM N,N,N'-Trimethyl-N'-(2-hydroxy-3-methyl-5-iodobenzyl)-1,3-propanediamine Phenol, 2-(((3-(dimethylamino)propyl)methylamino)methyl)-4-(iodo-123I)-6-methyl-