[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a derivative of the amino acid serine where the side chain hydroxyl group has been substituted with a phosphono group. Post-translational phosphorylation of serine residues in proteins or peptides can regulate the progression of multiple intracellular signal transduction pathways. Monomeric phosphoserine is an intermediate in L-serine biosynthesis."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O][P][=Branch1][C][=O][Branch1][C][O][O]"}]