[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=Branch2][Ring1][=Branch2][=C][C][=C][Ring1][=Branch1][C][Branch1][S][C][Branch1][Ring1][C][O][N][C][=Branch1][C][=O][C][Branch1][C][Cl][Cl][O][N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule has a relatively simple structure and was the first broad-spectrum antibiotic to be discovered. It acts by interfering with bacterial protein synthesis and is mainly bacteriostatic. (From Martindale, The Extra Pharmacopoeia, 29th ed, p106)"}]