1,4-Dichloropyrido[4,3-D]pyridazine14490-19-831 % similar 3-Fluoro-2-hydroxypyridine1547-29-131 % similar 1,6-Naphthyridine253-72-531 % similar 1H-Pyrrolo(2,3-b)pyridine271-63-631 % similar 3-Amino-2-pyridinol59315-44-531 % similar 2-Hydroxy-3-methylpyridine91914-04-431 % similar Thieno(2,3-d)pyrimidin-4(3H)-one14080-50-330 % similar