[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an optically active form of N-methylvaline having L-configuration. It is a N-methyl-L-alpha-amino acid and a N-methylvaline."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C]"}]