[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring2][N][C@@H1][Branch2][Ring2][Ring1][N][C@H1][Branch1][Ring2][S][Ring1][Branch1][C@@H1][Branch1][Branch1][C][Ring1][Branch1][=O][N][C][=Branch1][C][=O][C@@H1][Branch1][Branch2][C][=C][S][C][=C][Ring1][Branch1][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a broad-spectrum, semi-synthetic penicillin antibiotic with bactericidal activity. Similar to carbenicillin in action, ticarcillin inactivates the penicillin-sensitive transpeptidase C-terminal domain by opening the lactam ring. This inactivation prevents the cross-linkage of peptidoglycan strands, thereby inhibiting the third and last stage of bacterial cell wall synthesis. This leads to incomplete bacterial cell wall synthesis and eventually causes cell lysis."}]