[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a pyrimidine 2',3'-dideoxyribonucleoside."}, {"from": "gpt", "value": "[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]"}]