[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][NH1+1][=C][Branch1][Ring2][C][Ring1][=Branch1][N][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N]"}, {"from": "gpt", "value": "The molecule is a carboxamidinium ion consisting of 2,3,4,5-tetrahydropyridinium having a (4-aminobenzyl)amino group at the 2-position. It has a role as an epitope."}]