Mtb-cyt-bd oxidase-IN-4 (compound 1g) is a Mycobacterium tuberculosis cytochrome bd oxidase ( Mtb cyt-bd oxidase ) inhibitor with an IC 50 value of 0.25 μM. Mtb-cyt-bd oxidase-IN-4 inhibits the growth of Mycobacterium tuberculosis (MIC=8 μM). Mtb-cyt-bd oxidase-IN-4 can be used in tuberculosis research.