MmpL3-IN-1, also known as compound 32, is a highly effective inhibitor of Mycobacterial membrane protein large 3 (MmpL3). With an anti-tuberculosis activity exhibiting a minimum inhibitory concentration (MIC) of less than 0.016 μg mL in M. tuberculosis, MmpL3-IN-1 is a valuable compound for research on drug-resistant tuberculosis [1].