1H-1,2,3-Triazolo(4,5-d)pyrimidin-7-amine, N-hydroxy- 3H-v-Triazolo(4,5-d)pyrimidine, 7-(hydroxyamino)- 7-(Hydroxyamino)-3H-v-triazolo(4,5-d)pyrimidine 7269-62-7