[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an undecenoic acid having its double bond in the 10-position. It is derived from castor oil and is used for the treatment of skin problems. It has a role as a plant metabolite and an antifungal drug. It is a conjugate acid of a 10-undecenoate."}]