[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a pyrimidine 2'-deoxyribonucleoside."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][#Branch2][C][Branch2][Ring1][Ring2][O][C][Ring1][Branch1][N][C][=C][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][F][C][O][O]"}]