5-(2-(4-Morpholinyl)-2-oxoethyl)-4a,5-dihydropyrido[1,2-a]benzimidazol-2-amine 5-(2-(4-Morpholinyl)-2-oxoethyl)-4a,5-dihydropyrido[1,2-a]benzimidazol-2-ylamine AIDS-151672 AIDS151672 NSC693041