1,2,4-Triazolo(4,3-b)pyridazine, 6-(4-morpholinyl)-3-phenyl- 56383-13-2 6-(4-Morpholinyl)-3-phenyl-1,2,4-triazolo(4,3-b)pyridazine 6-Morpholino-3-phenyl-s-triazolo(4,3-b)pyridazine