[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is conjugate base of mono(2-ethylhexyl) phthalate arising from deprotonation of the free carboxy group; major species at pH 7.3. It is a conjugate base of a mono(2-ethylhexyl) phthalate."}, {"from": "gpt", "value": "[C][C][C][C][C][Branch1][Ring1][C][C][C][O][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}]