[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a fluoroquinolone antibiotic with broad-spectrum antimicrobial activity. Pefloxacin inhibits the activity of microbial DNA gyrase and topoisomerase IV. This disrupts DNA replication and prevents cell division."}, {"from": "gpt", "value": "[C][C][N][C][=C][Branch2][Ring1][S][C][=Branch1][C][=O][C][=C][C][=Branch2][Ring1][Branch1][=C][Branch1][#Branch1][C][=C][Ring1][=Branch1][Ring1][O][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][F][C][=Branch1][C][=O][O]"}]