[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch1][=C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][C][Ring1][Branch2][=O][C][=C][Branch1][=N][N][C][=Branch1][C][=O][C][=Branch1][Ring2][=C][Ring1][#Branch1][O-1][O-1]"}, {"from": "gpt", "value": "The molecule is an organic anion obtained by selective deprotonation of the hydroxy groups at positions 2 and 2' of nicotine blue; major species at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a nicotine blue."}]