1-[(2R,4S,5S)-4-Azido-5-(6-nitro-2-oxo-4H-2λ5-benzo[1,3,2]dioxaphosphinin-2-yloxymethyl)-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione

4-butanoyloxybenzyl bis(3'-azido-3'-deoxythymidin-5-yl) phosphate

1-((2R,4S,5S)-4-azido-5-(((6-chloro-2-oxido-4H-benzo[d][1,3,2]dioxaphosphinin-2-yl)oxy)methyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione

1-[(2R,4S,5S)-4-Azido-5-(8-methoxy-2-oxo-4H-2λ5-benzo[1,3,2]dioxaphosphinin-2-yloxymethyl)-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione

1-((2R,4S,5S)-4-azido-5-(((2-oxido-4H-benzo[d][1,3,2]dioxaphosphinin-2-yl)oxy)methyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione