[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an optically active form of lactate having (S)-configuration. It has a role as a Saccharomyces cerevisiae metabolite. It is a conjugate base of a (S)-lactic acid. It is an enantiomer of a (R)-lactate."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O]"}]