[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an ethyl 3-hydroxybutyrate. It is functionally related to a (R)-3-hydroxybutyric acid."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][C][C@@H1][Branch1][C][C][O]"}]