[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=C][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][O][=O]"}, {"from": "gpt", "value": "A synthetic naphthoquinone without the isoprenoid side chain and biological activity, but can be converted to active vitamin K2, menaquinone, after alkylation in vivo."}]