| http://www.w3.org/ns/prov#value | - The nucleoside analog of claim 2 having a structure according to Formula 3: where R1 is a masking group having any of the following structures: where X is O or S; Z is R2 is monoboranophosphate radical, diboranophosphate radical, triboranophosphate radical, stabilized monophosphate radical, stabilized diphosphate radical, or stabilized triphosphate radical; R is straight or branched C1-C18 alkyl,
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