1: β-D-2'-deoxy-2'-α-F-2'-β-C-methyluridine With 1,1-dimethylethylmagnesium chloride in tetrahydrofuran T=20°C; 0.5 h; 2: 2(S)-[(2,3,4,5,6-pentafluoro-phenoxy)-phenoxy-phosphorylamino]propionic acid isopropyl ester in tetrahydrofuran T=20°C; 72 h;