(2S,3R)-N-((2R,3R)-3-(benzyloxy)-4-((tert-butyldimethylsilyl)oxy)-1-(4-methoxyphenoxy)butan-2-yl)-3-((2R,3R,4R,5R)-3,4-bis((tert-butyldimethylsilyl)oxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)-N-methyloxirane-2-carboxamide