[{"from": "human", "value": "Describe this molecule. [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 an octadec-2-enoic acid having a cis- double bond."}]