(2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)tetrahydrofuran-3-yl (4-chlorophenyl) (2-cyanoethyl) phosphate

N4-acetyl-1-(3'-O-acetyl-2'-deoxy-β-D-arabinofuranosyl)cytosine

2'-deoxycytidylyl-(3'->5')-1'-deoxy-2'-isouridine