(R)-2-(3-methoxypropyl)-4-(methylamino)-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-dioxide hydrochloride; Brinzolamide N-Desmethyl N-methyl impurity
(R)-2-(3-methoxypropyl)-4-(methylamino)-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-dioxide hydrochloride; Brinzolamide N-Desmethyl N-methyl impurity