[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring2][Branch1][C@@H1][Branch2][Ring1][N][N][C@H1][Branch1][Ring2][S][Ring1][Branch1][C@@H1][Branch1][Branch1][C][Ring1][Branch1][=O][N][=C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is penicillanic acid carrying a (p-hydroxybenzylidene)amino substituent at the 6beta position. It has been used as a hapten in the production of a generic monoclonal antibody for determining penicillin residues in milk. It has a role as a hapten."}]