(1,2,4)Triazolo(1,5-a)pyrimidine-6-carboxylic acid, 1,5-dihydro-7-methyl-2-(methylthio)-5-oxo- 3043-83-2 5-Carboxy-6-hydroxy-4-methyl-2-methylmercapto-1,3,3a,7-tetrazaindene