[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][C][=O][C][C][Branch1][S][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N+1][=Branch1][C][=O][O-1][C][=C][Branch1][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][Ring1][#Branch2][=O][O]"}, {"from": "gpt", "value": "The molecule is a 4-hydroxycoumarin derivative with anticoagulant activity. As a vitamin K antagonist, acenocoumarol inhibits vitamin K epoxide reductase, thereby inhibiting the reduction of vitamin K and the availability of vitamin KH2. This prevents gamma carboxylation of glutamic acid residues near the N-terminals of the vitamin K-dependent clotting factors, including factor II, VII, IX, and X and anticoagulant proteins C and S. This prevents their activity and thus thrombin formation. Compared to other coumarin derivatives, acenocoumarol has a short half-life."}]