[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a commonly used oral anticoagulant with anti-vitamin K activity. Warfarin therapy is associated with rare instances of idiosyncratic, clinically apparent liver injury that are usually mild and rapidly reversible on stopping."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][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]"}]