[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch2][Ring2][O][C@@H1][Branch2][Ring2][C][N][C@H1][Branch1][Ring2][S][Ring1][Branch1][C@@H1][Branch1][Branch1][C][Ring1][Branch1][=O][N][C][=Branch1][C][=O][C][=C][Branch1][=Branch2][C][=C][C][=C][Ring1][=Branch1][O][C][O][C][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a semisynthetic, narrow spectrum beta-lactamase-resistant penicillin antibiotic with bactericidal and beta-lactamase resistant activity. Methicillin binds to specific penicillin-binding proteins (BPBs) on the bacterial cell wall, thereby preventing the cross-linkage of peptidoglycans, which are critical components of the bacterial cell wall. This leads to an interruption of the bacterial cell wall and causes bacterial lysis."}]