[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a pyrimidine nucleoside."}, {"from": "gpt", "value": "[C][N][C][=N][C][=Branch1][C][=O][N][Branch1][Branch1][C][=C][Ring1][#Branch1][C@H1][C@@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O][O]"}]