Brinzolamide Impurity 8

Chemical Name: (R)-4-(ethylamino)-2-(3-((R)-4-(ethylamino)-1,1-dioxido-6-sulfamoyl-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazin-2-yl)propyl)-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-dioxide