[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a 9,10-epoxyoctadecanoate that is the conjugate base of (9S,10R)-epoxyoctadecanoic acid arising from deprotonation of the carboxylic acid function; major species at pH 7.3. It is a conjugate base of a (9S,10R)-epoxyoctadecanoic acid. It is an enantiomer of a (9R,10S)-9,10-epoxyoctadecanoate."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C@@H1][C@@H1][Branch1][Ring2][O][Ring1][Ring1][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}]