1-Butylsulfonic-3-methylimidazolium hydrogensulfate
1-(Naphthalen-2-yloxy)-1H-imidazole-4-sulfonic acid
2-Amino-4-(4-methoxyphenyl)-1-methyl-1H-imidazole-5-sulfonic acid
1H-Imidazole-2-sulfonic acid
2-Amino-4H-imidazole-4-sulfonic acid
4-Methyl-1H-imidazole-5-sulfonic acid
