Pyrazolopyrimidine nucleosides. 13. Synthesis of the novel C-nucleoside 5-amino-3-(.beta.-D-ribofuranosyl)pyrazolo[4,3-d]pyrimidin-7-one, a guanosine analog related to the nucleoside antibiotic formycin B
Pyrazolopyrimidine nucleosides. 13. Synthesis of the novel C-nucleoside 5-amino-3-(.beta.-D-ribofuranosyl)pyrazolo[4,3-d]pyrimidin-7-one, a guanosine analog related to the nucleoside antibiotic formycin B