[{"from": "human", "value": "Describe this molecule. [C][=C][C][=Branch1][C][=N][C][=C][C][Ring1][#Branch1][=C][Branch1][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N]"}, {"from": "gpt", "value": "The molecule is an imine that is 4-methylidenecyclohexa-2,5-dien-1-imine in which both the hydrogens of the methylidene group are replaced by 4-aminophenyl groups. The hydrochloride salt is the histological dye 'pararosaniline'. It has a role as a fluorochrome and a histological dye. It is a substituted aniline and an imine. It is a conjugate base of a pararosaniline(1+)."}]