英文别名:
1H-Pyrazolo[4,3-d]pyriMidine, 3-(2-Methylpropyl)-;Sildenafil PyriMidine IMpurity;3-(2-methylpropyl)-2H-pyrazolo[4,3-d]pyrimidine;3-(2-Methylpropyl)-1H-pyrazolo[4,3-d]pyrimidine;Sildenafil Isobutylpyrazolopyrimidine Impurity;Isobutylpyrazolopyrimidine Impurity