A [3.1.0]-Fused 2',3'-Modified β-D-Pyrazolo[3,4-d]pyrimidine Nucleoside

The furanose ring in 4,6-bis(methylthio)-2-(2-3-anhydro-1-deoxy-β-D-allofuranosyl)-2H-pyrazolo [3,4-d]pyrimidine, C₁₃H₁₆N₄O₄S₂, is almost planar with the epoxide ring in an exo orientation.

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