3-Oxo-2-(3-phenyl-3H-imidazo[4,5-d]pyridazin-4-yl)-butyric acid ethyl ester

Cyano-(3-phenyl-3H-imidazo[4,5-d]pyridazin-4-yl)-acetic acid ethyl ester

4-benzyl-7-(methylsulfonyl)-1-phenyl-1H-imidazo<4,5-d>pyridazine