2,2′-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine]; 2-[4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-6,7-dimethoxyquinazolin-4-amine; Prazosin EP Impurity E; Terazosin EP Impurity E
2,2′-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine]; 2-[4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)piperazin-1-yl]-6,7-dimethoxyquinazolin-4-amine; Prazosin EP Impurity E; Terazosin EP Impurity E