[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dodecatetraenedioic acid with double bonds at positions 2, 4, 8, and 10 (all E isomer). It has a role as a metabolite."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][/C][=C][/C][=C][/C][=Branch1][C][=O][O][C][/C][=C][/C][=C][/C][=Branch1][C][=O][O]"}]