IUPAC:1-[(2R,4R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-1,2,3,4-tetrahydro(2-13C,1,3-15N2)pyrimidine-2,4-dione
IUPAC:1-[(2R,4R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-1,2,3,4-tetrahydro(2-13C,1,3-15N2)pyrimidine-2,4-dione