[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][N][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][C][C][C][Branch1][=Branch2][C][Branch1][Ring2][O][Ring1][Branch1][C][O][N]"}, {"from": "gpt", "value": "The molecule is a pyrimidine 2',3'-dideoxyribonucleoside."}]