[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a carboxylic ester. It is functionally related to a 2-furoic acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C][O][C][=Branch1][C][=O][C][=C][C][=C][O][Ring1][Branch1]"}]