English name:6-Chloroimidazo[1,2-b]pyridazine Molecular formula:C6H4N3Cl Molecular weight:153.56906
English name:3,6-Dichloro-4-methylpyridazine Molecular formula:C5H4N2Cl2 Molecular weight:163.00466
English name:3-Chloro-6-methoxypyridazine Molecular formula:C5H5N2OCl Molecular weight:144.559