IUPAC: (2R,3R,4S,5R)-2-(6-amino-2-ethynyl-9H-purin-9-yl)-5-(hydroxymethyl)oxolane-3,4-diol

SMILES: Nc1nc(nc2n(cnc12)[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O)C#C