Pivmecillinam hydrochloride is an orally active prodrug of mecillinam an extended-spectrum penicillin antibioticand?is active against gram-negative organisms and used as for amdinocillin.

Wnt pathway inhibitor 4 is a small molecule antimicrobial agent with antibacterial and antiproliferative activity against cancer cells.

4-Hydroxy-25-dimethyl-3(2H)furanone is a naturally occurring substance found in a variety of fruits. It has been shown to have antimicrobial activity.