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Several 3- [ 1- (4-ethoxyphenyl)-5-methyl- 1,2, 3-triazol-4-yl ]-6-substituted-s-triazolo [ 3,4- b ]- 1,3,4-thiadia zoles have been synthesized and the structures of these compounds were established by MS, IR and 1H NMR spectral data.……