N-[3-[(4-Amino-6,7-dimethoxy-2-quinazolinyl)methylamino]propyl]-2-furancarboxamide; Alfuzosin Tetradehydro Impurity; Alfuzosin Hydrochloride; Furamide analog; N-{3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)(methyl)amino]propyl}furan-2-carboxamide (USP);