3(2H)-Pyridazinone, 4,5-dihydro-4-methyl-2-(2-morpholinoethyl)-6-phenyl-, hydrochloride 33048-51-0 4,5-Dihydro-4-methyl-2-(2-morpholinoethyl)-6-phenyl-3(2H)-pyridazinone hydrochloride AG 277 Morpholinoethyl-2 methyl-4 phenyl-6 dihydro-4,5 pyridazone chlorhydrate [French]