Antitubercular agent 34 (compound 42g) is an antitubercular agent. Antitubercular agent 34 inhibits the growth of MtbH37Rv with a MIC90 value of 1.25 μg/mL with the ability of escaping metabolic degradation by human liver microsomes. Antitubercular agent 34 can be used for the research of tuberculosis.