4-Pyridazinecarbonitrile, 5,6-bis(4-fluorophenyl)-2, 3-dihydro-2-(2-hydroxyethyl)-3-oxo- 5,6-Bis(4-fluorophenyl)-2-(2-hydroxyethyl)-3-oxo-2,3-dihydro-4-pyridazinecarbonitrile 75643-56-0 AIDS-129708 AIDS129708 NSC362454