4-Amino-2-chloro-6,7-dimethoxyquinazoline ; CAS # 23680-84-4 ;

Terazosin 4-Hydroxy Analog ; Terazosin USP RC B ;

Terazosin USP RC A ; 4-Amino-6,7-dimethoxy-2-(1-piperazinyl)quinazoline ; CAS # 60547-97-9 ;

4-Amino-6,7-dimethoxy-2-(4-formyl-1-piperazinyl)quinazoline ; CAS # 84050-21-5 ;

Terazosin USP RC C ; Prazosin EP Impurity E ; 2,2-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine] ; CAS # 102839-00-9 ;

1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-(5-hydroxypentanoyl)piperazine HCl ; CAS # 109678-71-9 (base) ;

6-O-Desmethyl Terazosin ; 1-(4-Amino-6-hydroxy-7-methoxyquinazolin-2-yl)-4-[[(2RS)-tetrahydrofuran-2-yl]carbonyl]piperazine ; CAS # 105356-89-6 ;

7-O-Desmethyl Terazosin ; 1-(4-Amino-7-hydroxy-6-methoxyquinazolin-2-yl)-4-[[(2RS)-tetrahydrofuran-2-yl]carbonyl]piperazine ; CAS # 105356-90-9 ;

1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-[[(2RS,5S)-5-methyltetrahydro furan-2-yl]carbonyl]piperazine ; CAS # 1177261-85-6 ;

1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-[(2RS)-2-hydroxypentanoyl] piperazine ; CAS # 152551-75-2 ;

Prazosin HCl ; 1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-(furan-2-ylcarbonyl)piperazine HCl ; CAS # 19237-84-4 ;

Prazosin EP Impurity D ; 1-(Furan-2-ylcarbonyl)piperazine ; CAS # 40172-95-0 ;

Prazosin EP Impurity B ; 1,4-bis(Furan-2-ylcarbonyl)piperazine ; CAS # 31350-27-3 ;

1-[[(2RS)-Tetrahydrofuran-2-yl]carbonyl]piperazine ; CAS # 63074-07-7 ;

1,4-bis[(tetrahydrofuran-2-yl)carbonyl]piperazine ; CAS # 547730-06-3 ;

CAS # 70024-40-7 ;