[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a matrix for matrix-assisted laser desorption technique for protein MW determination. It is also a constituent of propolis."}, {"from": "gpt", "value": "[C][O][C][=C][C][=Branch1][O][=C][C][=Branch1][Branch1][=C][Ring1][=Branch1][O][O][C][/C][=C][/C][=Branch1][C][=O][O]"}]