1H-Isoindole-1,3(2H)-dione, 2-((4-oxo-3(4H)-quinazolinyl)methyl)-, dihydrochloride 2-((4-Oxo-3(4H)-quinazolinyl)methyl)-1H-isoindole-1,3(2H)-dione dihydrochloride 75159-42-1