[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a phthalate ester that is the dipropyl ester of benzene-1,2-dicarboxylic acid. It is a phthalate ester and a diester."}, {"from": "gpt", "value": "[C][C][C][O][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C][C][C]"}]