4,5-Diiodo-1H-imidazole15813-09-9100 % similar 2,4,5-Triiodo-1H-imidazole1746-25-433 % similar 4,5-Diiodo-2-methyl-1H-imidazole73746-44-831 % similar Purine120-73-030 % similar 2-Iodo-3-pyridinol40263-57-830 % similar