(R)-(+)-2-{[(3-Methyl-4-nitropyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole

The title compound, C14H12N4O3S, is an inter­mediate of Dexlansoprazole, a proton pump inhibitor (PPI) mainly developed for anti-ulcer activity. The absolute configuration of the title compound was determined as R. The crystal structure reveals that the mol­ecules form chains along the b axis through N—H⋯N and C—H⋯O hydrogen-bonded dimers. These chains are connected via weak C—H⋯O hydrogen bonds.