[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][N+1][=C][Branch2][Ring2][C][N][C@H1][Branch2][Ring1][=Branch1][C@H1][C@][Ring1][=Branch1][Branch1][Branch2][C][Ring1][=Branch2][Branch1][C][O][O][N][C][=Branch1][Ring2][=NH1+1][Ring1][Branch2][N][C][O][C][=Branch1][C][=O][N][N]"}, {"from": "gpt", "value": "The molecule is an iminium ion resulting from the protonation of the two imine groups of saxitoxin; major species at pH 7.3. It is a conjugate acid of a saxitoxin."}]