[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the R-enantiomer of serine. It has a role as a NMDA receptor agonist, a human metabolite and an Escherichia coli metabolite. It is a D-alpha-amino acid and a serine. It is a conjugate base of a D-serinium. It is a conjugate acid of a D-serinate. It is an enantiomer of a L-serine. It is a tautomer of a D-serine zwitterion."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O]"}]