[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][C][C][C][C@@H1][Branch2][Ring1][#Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][C@H1][Branch1][Branch1][C][C][S][C][N][C][=O]"}, {"from": "gpt", "value": "The molecule is a peptide anion obtained by deprotonation of the carboxy group of N-formyl-L-methionyl-L-leucyl-L-phenylalanine; major species at pH 7.3. It is a conjugate base of a N-formyl-L-methionyl-L-leucyl-L-phenylalanine."}]