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

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