[{"from": "human", "value": "Describe this molecule. [B][Branch2][Ring2][#C][C@H1][Branch1][#Branch2][C][C][C][NH1+1][=C][Branch1][C][N][N][N][C][=Branch1][C][=O][C@@H1][C][C][C][N][Ring1][Branch1][C][=Branch1][C][=O][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][C][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is a guanidinium ion resulting from the protonation of the guanidino group of Ac-(D)Phe-Pro-boroArg-OH. The major species at pH 7.3. It is a conjugate acid of an Ac-(D)Phe-Pro-boroArg-OH."}]