EP-G Nitroso impurity

CAS No: NA
Chemical Name:
6,7-dimethoxy-2-(4-nitrosopiperazin-1-yl)quinazolin-4-amine
Molecular Formula:
C14H18N6O3

EP-B Nitroso impurity

CAS No: NA
Chemical Name:
6,7-dimethoxy-2-(4-nitrosopiperazin-1-yl)quinazolin-4-amine
Molecular Formula:
C14H18N6O3

USP related compund C/EP-F

CAS No: 23680-84-4
Chemical Name:
4-Amino-2-chloro-6,7-dimethoxyquinazoline
Molecular Formula:
C10H10ClN3O2

USP related compund D/EP-A

CAS No: 3663-80-7
Chemical Name:
(2RS)-2,3-dihydro-1,4-benzodioxine-2-carboxylic acid
Molecular Formula:
C9H8O4

USP related compund F/EP-C

CAS No: 617677-53-9
Chemical Name:
N,N′-Bis(1,4-benzodioxane-2-carbonyl)piperazine
Molecular Formula:
C22H22N2O6

USP Torazosin related compund A/EP-G

CAS No: 60547-97-9 free base 84050-22-6 (HCl salt) ; 60548-08-5 (2HCl salt)
Chemical Name:
6,7-Dimethoxy-2-(piperazin-1-yl)quinazolin-4-amine
Molecular Formula:
C14H19N5O2

Reference standared

CAS No: 74191-85-8
Chemical Name:
1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-[(2RS)-2,3-dihydro-1,4-benzodioxin-2-ylcarbonyl]piperazine
Molecular Formula:
C23H25N5O5

USP related compund A/EP-B

CAS No: 70918-74-0HCl 70918-00-2 (free base)
Chemical Name:
N-(1,4-Benzodioxane-2-carbonyl)piperazine hydrochloride
Molecular Formula:
C13H17ClN2O3