Penicillin is grown from molds and has the general formula of C<sub>9</sub>H<sub>11</sub>N<sub>2</sub>O<sub>4</sub>SR , where "R" represents a chemical group that is different for different types of penicillin. Its diagram is as follows: | Penicillin is grown from molds and has the general formula of C<sub>9</sub>H<sub>11</sub>N<sub>2</sub>O<sub>4</sub>SR , where "R" represents a chemical group that is different for different types of penicillin. Its diagram is as follows: |