1,2,4-triazolo[4,3-a]pyrimidin-5(8H)-one, 7-methyl-3-(methylthio)- 7-methyl-3-(methylthio)[1,2,4]triazolo[4,3-a]pyrimidin-5(8H)-one InChI=1/C7H8N4OS/c1-4-3-5(12)11-6(8-4)9-10-7(11)13-2/h3H,1-2H3,(H,8,9