[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=C][Branch1][P][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Ring1][O][=O][C][/C][=C][Branch1][C][\\C][/C][C][C][C@H1][Branch1][C][C][C][C][C][C@H1][Branch1][C][C][C][C][C][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is often called vitamin K1. It is a fat-soluble vitamin that is stable to air and moisture but decomposes in sunlight. It is found naturally in a wide variety of green plants. Phylloquinone is also an antidote for coumatetralyl. Vitamin K is needed for the posttranslational modification of certain proteins, mostly required for blood coagulation."}]