[{"from": "human", "value": "Describe this molecule. [C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O][\\C][=C][\\C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an all trans dicarboxylic acid that is a metabolite of benzene and is used as a marker for occupational or environmental exposure to benzene."}]