4-chloro-7-(5-deoxy-2,3-O-isopropylidenyl-β-D-ribofuranosyl)-5-phenylpyrrolo[2,3-d]pyrimidine

4-amino-1-(5-deoxy-2,3-O-isopropylidenyl-β-D-ribofuranosyl)-3-phenylpyrazolo[3,4-d]pyrimidine

4-amino-5-phenyl-7-(5-deoxy-2,3-O-isopropylidenyl-β-D-ribofuranosyl)pyrrolo[2,3-d]pyrimidine

4-amino-1-(5-deoxy-2,3-diacetoxy-β-D-ribofuranosyl)-3-phenylpyrazolo[3,4-d]pyrimidine

4-N-(carbomethoxymethyl)amino-5-phenyl-7-(5-deoxy-2,3-O-isopropylidenyl-β-D-ribofuranosyl)pyrrolo[2,3-d]pyrimidine