| http://www.w3.org/ns/prov#value | - The improved method of claim 4, wherein said nucleoside further comprises a compound of the following structure: wherein R1, R2, R3, and R4 independently are a hydrogen atom, a lower alkyl, aryl, benzyl, halogen, hydroxyl, alkoxyl. thio, thioether, amino, nitro, carboxyl, formate, for amino or phosphido group, or adjacent substituents R1-R4 are substituted oxygen groups that together form a cyclic
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