The high chemotherapeutic activity of the sulfanilamido derivatives of various aminoheterocycles (eg, sulfathiazole, sulfadiazine, sulfamethazine and sulfapyridine) has led to the preparation of many other sulfanilamido derivatives of similar structure. In these Laboratories it was thought desirable to prepare the various isomers of sulfanilamidoindazole in order to obtain information on the effect of substitution of the ...