2-Chloro-6,7-dimethoxyquinazolin-4-yl Chloride; USP Doxazosin Related Compound E; Doxazosin EP Impurity E;2,4-Dichloro-6,7-dimethoxyquinazoline
2-Chloro-6,7-dimethoxyquinazolin-4-yl Chloride; USP Doxazosin Related Compound E; Doxazosin EP Impurity E;2,4-Dichloro-6,7-dimethoxyquinazoline