5-(Difluoromethoxy)-1-((3,4-dimethoxypyridin-2-yl)methyl)-1,3-dihydro-2H-benzo[d]imidazole-2-thione

5-(Difluoromethoxy)-1-((3,4-dimethoxypyridin-2-yl)methyl)-1,3-dihydro-2H-benzo[d]imidazole-2-thione is the active pharmaceutical ingredient in pantoprazole, a proton pump inhibitor (PPI) used to treat GERD, stomach ulcers, and excess acid secretion.