1,4-Di-4-morpholinyl-7-phenylpyrido(3,4-d)pyridazine 1,4-Dimorpholino-7-phenylpyrido(3,4-d)pyridazine 39632-88-7 DS 511 DS-511 NSC 309704 Pyrido(3,4-d)pyridazine, 1,4-di-4-morpholinyl-7-phenyl-