Structure Of Antobiotics -
| Antibiotic | Molecular Structure |
| 1.Penicillins&Cephalosporins | β-lactam ring |
| 2.Aminoglycosides(e.g. Streptomycin,neomycin,amikacin) | Amino sugars in a glycosidie linkage |
| 3.Macrolides(e.g.erythromycin and oleandomycin) | Macrooyclic Lactone |
| 4.Tetracyclines | polycyclic naphthone carboxide |
| 5.Chloramphenicol | Nitrobenzene Derivative of dichloracetic acid |
| 6.Peptide antibiotics | Peptide linked D and L amino acids |
| 7.Antifungal antibiotics | Polyens&nonpolyenes |
| 8.Ansamacrolides (e.g. Streptovaricins and rifamycins) | Naphto and benzoquinone nuclei derivatives |
| 9.Anthracyclinc antibiotics(e.g. adriamycin&duanomycin) | Anthracycline |
| 10.Unclassified | Cycloserine, novobiocin and fusidic acid |