Penicillins are important antibiotics. The core structure of penicillins contains a β-lactam ring, which is a cyclic amide, fused to a sulfur-containing thiazolidine ring. There is another amide attached to the β-lactam ring. It is at this amide where the structures of penicillin compounds differ. Some penicillins are naturally occurring (isolated from molds), and some are semisynthetic (altered in the lab from naturally-occurring structures). Read the information about semisynthetic penicillins in the “A Medical Perspective” box on page 540) of your textbook. For this discussion, you should start a thread to answer ALL parts of the following question. If you use any sources other than your textbook, make sure you cite them.

• Provide the name of a penicillin antibiotic.

• Is this penicillin natural or semisynthetic?

• What is the clinical use of this penicillin?

• Provide some useful information about this penicillin (e.g. allergy information, other drugs taken with it, method of administration, etc.)