5-Bromoquinoxalin-6-amine Brimonidine Impurity E 5-Bromoquinazolin-6-ylthiourea BriMonidine-2,3-dione 5-bromo-N-(4,4,5,5-tetradeuterio-1H-imidazol-2-yl)quinoxalin-6-amine Brimonidine Tartrate Brimonidine Related Impurity 3 Brimonidine N-(4,5-Dihydro-1H-iMidazol-2-yl)-6-quinoxalinaMine 4,5-Didehydro BriMonidine 6-Aminoquinoxaline Brimonidine Tartrate Impurity 4 5-chloro-N-(4,5-dihydro-1H-imidazol-2-yl)quinoxalin-6-amine Brimonidine Impurity 14 5-BROMO-6-ISOTHIOCYANATE QUINOXALINE Thiourea, N-(2-aminoethyl)-N'-(5-bromo-6-quinoxalinyl)- Thiourea, N-(2-aminoethyl)-N'-6-quinoxalinyl- Brimonidine Impurity 6