Thyrotax

Structural formula:

Cefiaxime is a cyclic N-heterocyclic derivative of 7-oxotetracycline. It has a peculiar structure. The heteromethanol-substituted tetracycline ring forms a new group on the carbon chain of the cephalosporin molecule that is almost parallel to the main chain and is linked at position 3. Thus, the main chain is slightly narrowed at this location, giving cephalin a molecular architecture slightly different from the morphology of other cephalosporins.