[{"from": "human", "value": "Describe this molecule. [C][O][C][=C][C][=Branch1][O][=C][C][=Branch1][Branch1][=C][Ring1][=Branch1][O][O][C][/C][=C][/C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a sinapic acid in which the double bond has trans-configuration. It has a role as a MALDI matrix material and a plant metabolite. It is a conjugate acid of a trans-sinapate."}]