2H-1,4-Benzothiazine-2-carboxylic acid, 3,4-dihydro-4-ethyl-, sodium salt 97699-28-0 Sale sodico dell'acido 4-etil-2,3-diidro-1,4-benzotiazina-2-carbossilico [Italian] Sodium 3,4-dihydro-4-ethyl-2H-1,4-benzothiazine-2-carboxylate