5-Bromo-6-(2-imidazolin-2-ylamino)quinoxaline 5-Bromo-N-(4,5-dihydro-1H-imidazol-2-yl)-6-quinoxalinamine 59803-98-4 6-Quinoxalinamine, 5-bromo-N-(4,5-dihydro-1H-imidazol-2-yl)- 70359-46-5 Alphagan P BRN 0751629 Brimonidine LK 14304-18 UK 14304