[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][N][=C][C][=C][C][=C][C][Ring1][=Branch1][=NH1+1][Ring1][O][N]"}, {"from": "gpt", "value": "The molecule is an acridinium ion resulting from the protonation of the ring nitrogen of 9-aminoacridine. The major species at pH 7.3. It is a conjugate acid of a 9-aminoacridine."}]