4-amino-1-(2-hydroxyethoxymethyl)pyrazolo[3,4-d]pyrimidine-3-carbonitrile

N-[4-amino-1-(2-hydroxyethoxymethyl)pyrazolo[3,4-d]pyrimidin-3-yl]acetamide

4-amino-1-(2-hydroxyethoxymethyl)pyrazolo[3,4-d]pyrimidine-3-carboxamide

4-amino-1-(2-hydroxyethoxymethyl)pyrazolo[3,4-d]pyrimidine-3-carbothioamide

2-[(4-amino-3-cyanopyrazolo[3,4-d]pyrimidin-1-yl)methoxy]ethyl acetate