1H-Pyrazolo[3,4-d]pyrimidin-4-amine 1H-Pyrazolo[3,4-d]pyrimidine, 4-amino- 2380-63-4 4 APP 4-APP 4-Aminopyrazole[3,4-d]pyrimidine 4-Aminopyrazolo[3,4-d]pyrimidine 4-Aminopyrazolopyrimidine NSC1393 Pyrazoloadenine