[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a serine derivative that is L-serine with a methyl group replacing the hydrogen on the hydroxy side chain. It has a role as a metabolite. It is a L-serine derivative and a non-proteinogenic L-alpha-amino acid."}, {"from": "gpt", "value": "[C][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]