1-(3-deoxy-3-C-(4,5-dihydro-5-methyl-1,3,5-dithiazin-2-yl)-5-O-trityl-β-D-arabino-pentofuranosyl)uracil

1-[(2R,3S,4S,5S)-3-hydroxy-4,5-bis(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione

1-[5-O-(tert-butyldiphenylsilyl)-3-deoxy-3-C-(hydroxymethyl)-β-D-arabino-pentofuranosyl]uracil