[{"from": "human", "value": "Generate a molecule based on this description. The molecule is the (3S)-beta-isomer of leucine. It is an enantiomer of a (3R)-beta-leucine."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][N]"}]