2-(3-Methoxypropyl)-4-oxo-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-dioxide; 2-(3-Methoxypropyl)-4-oxo-3,4-dihydro-2H-thieno[3,2-e][1,2]thiazine-6-sulfonamide 1,1-dioxide; 3,4-Dihydro-2-(3-methoxypropyl)-4-oxo-2H-thieno[3,2-e]-1,2-thiazine-6-sulfonamide 1,1-Dioxide