[{"from": "human", "value": "Provide a description of this molecule. [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 straight-chain, monounsaturated, 16-carbon fatty acid with a trans-double bond at position C-9; the trans-isomer of palmitoleic acid and predominant trans-16:1 isomer in cheeses from goat and ewe milk. Major dietary sources are partly hydrogenated vegetable oils. It is a monounsaturated fatty acid and a long-chain fatty acid."}]