1-<2'-deoxy-3',5'-di-O-(p-toluoyl)-β-D-erythro-pentafuranosyl>-4-methoxy-1H-pyrazolo<3,4-d>pyrimidine
benzoyl chloride
4-amino-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine
4,4'-dimethoxytrityl chloride
4-(benzoylamino)-1-(2'-deoxy-β-D-erythro-pentafuranosyl)-1H-pyrazolo<3,4-d>pyrimidine
4-benzoylamino-1-(2,3-dideoxy-β-D-glycero-pentofuranosyl)-5'-O-(4,4'-dimethoxytriphenylmethyl)-1H-pyrazolo<3,4-d>pyrimidine
4-amino-1-(2,3-dideoxy-β-D-glycero-pentofuranosyl)-5'-O-(4,4'-dimethoxytriphenylmethyl)-1H-pyrazolo<3,4-d>pyrimidine
4-amino-1-(2,3-dideoxy-β-D-glycero-pentofuranosyl)-1H-pyrazolo<3,4-d>pyrimidine
4-benzoylamino-1-(2-deoxy-β-D-erythro-pentofuranosyl)-5'-O-(4,4'-dimethoxytriphenylmethyl)-3'-O-phenoxythiocarbonyl-1H-pyrazolo<3,4-d>pyrimidine