N,N-Dimethyl 4-iodo-1H-imidazole-1-sulfonamide135773-25-0100 % similar Imidazole-1-sulfonic acid dimethyl amine78162-58-047 % similar 4-Iodo-1-methyl-1H-imidazole71759-87-041 % similar 4-Iodo-1-tritylimidazole96797-15-831 % similar