[{"from": "human", "value": "Please give me some details about this molecule. [C][C][C][C][C][C][C][C][C][C][C][/C][=C][/C][=C][/C][=C][/C][=C][/C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a polyunsaturated long-chain fatty acid with a 20-carbon backbone and exactly 4 double bonds. Eight different isomers can be called by this name."}]