2503-56-2 5-Methyl-7-hydroxy-1,3,4-triazaindolizine Methyl hydroxytriazaindolizine NSC511493 [1,2,4]Triazolo[1,5-a]pyrimidin-7-ol, 5-methyl- s-Triazolo[1,5-a]pyrimidin-7-ol, 5-methyl-