[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch2][Ring2][Ring1][N][C@@H1][Branch2][Ring1][=Branch2][C@@H1][Branch1][Branch1][C][Ring1][Ring2][=O][N][C][=Branch1][C][=O][C@@H1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][N][S][C][Ring2][Ring1][Ring2][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the first of the first generation cephalosporins. This antibiotic contains a  beta lactam and a dihydrothiazide. Cephalexin is used to treat a number of susceptible bacterial infections through inhibition of cell wall synthesis. Cephalexin was approved by the FDA on 4 January 1971."}]