130832-78-9 2H-1,4-Benzothiazine-2-carboxylic acid, 2-(diethylamino)-3,4-dihydro-7-methyl-3-oxo-, ethyl ester 2H-1,4-Benzothiazine-2-carboxylic acid, 3,4-dihydro-2-(diethylamino)-7-methyl-3-oxo-, ethyl ester 7-Methyl-2-diethylamino-2-ethoxycarbonyl-2H-1,4-benzthiazin-3(4H)-one BRN 4328381