for the following products
5-Methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol | 7-Hydroxy-5-methyl-1,2,4-triazolo[1,5-a]pyrimidine | 7-Hydroxy-5-methyl-1,3,4-triazaindolizine | 7-Hydroxy-5-methyl-[1,2,4]triazolo[2,3-a]pyrimidine and 5-Methyl-s-triazolo[1,5-a]pyrimidin-7-ol
