Grana and L. Lilla, Ed. Sci., 12, 65 (1957). amide by reaction with acylating agents, aldehydes or urea. However, no compound of this class has been reported where a sulfamyl group is present. The only biologic property previously noted for any 1, 2, 4- benzothiadiazine-l, l-dioxide is the sweet taste of 3-oxodihydro-1, 2, 4-benzothiadiazine-l, l- di~ xide.~~~~~ In our studies, compounds of greatest interest have the general structures ...