5-Methyl-2′-deoxy-4′-thio-α-uridine (R)-S-Oxide

The pyrimidine ring of the title compound, C10H14N2O5S, is planar to within 0.024 (1) A and makes an angle of 75.46 (10)° with the mean plane of the thio­sugar ring. In terms of standard nucleoside nomenclature, this ring has the C3′-endo conformation. The O5′—C5′—C4′—C3′ torsion angle is 166.5 (3)° and the glycosidic torsion angle S4′—C1′—N1—C2 is −52.1 (2)° (syn).