A<unk>  is a member of a large group of broad-spectrum bacteriocidals that share a bicyclic core structure related to the substance 4-quinolone. They are used in human and veterinary medicine to treat bacterial infections, as well as in animal husbandry, specifically poultry production. Nearly all<unk> s in use are fluoroquinolones, which contain a fluorine atom in their chemical structure and are effective against both Gram-negative and Gram-positive bacteria. One example is ciprofloxacin, one of the most widely used antibiotics worldwide.
Quinolone antibiotic
Polypeptide antibiotic
Beta-lactam antibiotics
Lipase inhibitors
Nonsteroidal anti-inflammatory drug
Antiviral drug
Protease inhibitor 
Antibiotic