Methanesulfonic acid 2-[(2S,3R,4R,5R)-2-(tert-butyl-diphenyl-silanyloxymethyl)-4-methoxy-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl]-ethyl ester

1-{(2R,3R,4R,5S)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-3-methoxy-4-[2-(4-methoxy-phenoxy)-ethyl]-tetrahydro-furan-2-yl}-4-(2,6-dichloro-phenoxy)-5-methyl-1H-pyrimidin-2-one