134749-43-2 2(1H)-Quinazolinone, 4-amino-6,7-dimethoxy-, HCl 2(1H)-Quinazolinone, 4-amino-6,7-dimethoxy-, monohydrochloride 4-Amino-6,7-dimethoxy-2(1H)-quinazolinone monohydrochloride 6,7-Dimethoxy-4-amino-2-quinazolinone hydrochloride