1,2,4-Triazolo(4,3-b)pyridazine, 3,8-dimethyl-6-(4-morpholinyl)- 3,8-Dimethyl-6-(4-morpholinyl)-1,2,4-triazolo(4,3-b)pyridazine 3,8-Dimethyl-6-morpholino-s-triazolo(4,3-b)pyridazine 56383-09-6