[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=C][C][=C][C][=C][Ring1][=Branch1][N][=C][C][Ring1][#Branch2][=C][C][=Branch2][Ring1][=C][=N][C][=C][Branch1][P][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][C][=C][Ring2][Ring1][Branch1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an organic heterotetracyclic compound that is 7-phenyl-5-imino-5,7-dihydrobenzo[a]phenazine-3-sulfonic acid in which the imino hydrogen is replaced by a 2,4-disulfophenyl group. The disodium salt is the biological stain 'azocarmine B'. It is an arenesulfonic acid, an imine and an organic heterotetracyclic compound. It is a conjugate acid of an azocarmine B(2-)."}]