3(2H)-Pyridazinone, 4,5-dihydro-4-hydroxy-6-(p-hydroxyphenyl)-4-methyl-2-(2-morpholinoethyl)-, hydrochloride 33048-53-2 4,5-Dihydro-4-hydroxy-6-(p-hydroxyphenyl)-4-methyl-2-morpholinoethyl-3(2H)-pyridazone HCl AG 253