[{"from": "human", "value": "Describe this molecule. [C][/C][=C][Branch1][C][/C][\\C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the (Z)-isomer of 2-methylbut-2-enoic acid. It is found in plant species of the family Apiaceae. It has a role as a plant metabolite. It is functionally related to an isocrotonic acid."}]