[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N][C][=C][C][=Branch1][=Branch1][=N][C][=N][Ring1][=Branch1][N][Branch1][Branch1][C][=N][Ring1][Branch2][C@H1][C][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is a purine 2'-deoxyribonucleoside."}]