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# What functional groups are present in the antibiotic penicillin?

Mar 16, 2016

There are two amide groups. a carboxylate ion, and a thioether.

#### Explanation:

The structure of Penicillin G is

The functional groups are:

• at $1$, a thioether
• at $4 , 7 , 8$, an amide
• at $11 , 12 , 13$, a carboxylate ion
• at $14 , 15$, an amide

The 5-membered ring is called a thiazolidine ring.

An amide that is part of a 4-membered ring is called a β-lactam.