Patent ID: 7589078

Claim:
A compound according to the formula: Wherein B is R is H, F, Cl, Br, I, C 1 -C 4 alkyl, —C≡N, —C≡C—R a , X is H, C 1 -C 4 alkyl, F, Cl, Br or I; R 1 is H, an acyl group, a C 1 -C 20 alkyl or an ether group; R 2 is H, an acyl group, a C 1 -C 20 alkyl or ether group, a phosphate, diphosphate, triphosphate, phosphodiester group or a group; Nu is a radical of a biologically active antiviral compound such that an amino group or hydroxyl group from said biologically active antiviral compound forms a phosphate, phosphoramidate, carbonate or urethane group with the adjacent moiety; R 8 is H or a C 1 -C 20 alkyl or ether group; R 3 is a C 3 or C 4 alkyl group, or a —(CH 2 ) n —C≡C—R a group; R 3a and R 3b are each independently H, F, Cl, Br and I; R a is H, F, Cl, Br, I, or —C 1 -C 4 alkyl; Y is H, F, Cl, Br, I or —C 1 -C 4 alkyl; k is 0, 1 or 2; and n is 0, 1, 2, 3, 4 or 5; or an anomer, pharmaceutically acceptable salt, polymorph or solvate thereof.