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