LansoprazoleSulfideD4 is a deuterium labeled LansoprazoleSulfide. LansoprazoleSulfide is an orally active anti-TB (Mycobacterium tuberculosis) agent with IC50 values of 0.59 μM intracellularly and 0.46 μM in broth.LansoprazoleSulfide is an active metabolite of the proton pump inhibitor Lansoprazole.