InChI=1/C6H4N2O2S2/c1-10-5(9)4-2-3-6(11-4)12-8-7-3/h2H,1H methyl thieno[3,2-d][1,2,3]thiadiazole-5-carboxylate thieno[3,2-d][1,2,3]thiadiazole-5-carboxylic acid, methyl ester