[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][Branch1][C][C][C][C@@H1][Branch2][Ring1][C][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch1][C][C][S][C][C][=Branch1][C][=O][N][N][C][=Branch1][C][=O][C][N][C][=Branch1][C][=O][C@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][N]"}, {"from": "gpt", "value": "The molecule is a tetrapeptide composed of L-phenylalanine, glycine, L-leucine, and L-methioninamide joined in sequence by peptide linkages. It is a C-terminal fragment of substance P. It is functionally related to a L-phenylalanine, a glycine, a L-leucine and a L-methioninamide. It is a conjugate base of a L-Phe-Gly-L-Leu-L-Met-NH2(1+)."}]