PptT-IN-3 (compound 5p) is a potent inhibitor of with phosphopantetheinyl phosphoryl transferase ( PptT ) an IC 50 of 3.5 μM. Phosphopantetheinyl transferase, an essential enzyme that plays a critical role in the biosynthesis of cellular lipids and virulence factors in Mycobacterium tuberculosis. PptT-IN-3 has the potential for the research of tuberculosis.