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