[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an organic sodium salt having 2-oxo-3-[(1R)-3-oxo-1-phenylbutyl]-2H-1-benzopyran-4-olate as the counterion (the racemate is warfarin sodium, an anticoagulant drug and rodenticide). It contains a (R)-warfarin(1-). It is an enantiomer of a (S)-warfarin sodium."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C@H1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Branch1][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][Ring1][#Branch2][=O][O-1].[Na+1]"}]