| CPC C12N 15/1137 (2013.01) [A61K 9/0019 (2013.01); A61K 45/06 (2013.01); A61P 35/04 (2018.01); C07H 21/04 (2013.01)] | 22 Claims |

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1. A nucleic acid molecule comprising FdUMP[10] having a polyethylene glycol (PEG) spacer appended to the 5′-terminus and a moiety appended to the 3′-terminus, wherein the moiety is cytosine arabinoside.
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