O-benzyl-N-((2S,3R)-3-((2R,3R,4R,5R)-3,4-bis((tert-butyldimethylsilyl)oxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)oxirane-2-carbonyl)-D-serine

(2R,3S)-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-((R)-1-(tert-butoxy)-4-diazo-3-oxobutan-2-yl)-3-hydroxy-2-(methylamino)propanamide

(3R,7R)-3-((S)-((2R,3R,4R,5R)-3,4-bis((tert-butyldimethylsilyl)oxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)(hydroxy)methyl)-7-(tert-butoxymethyl)-4-methyl-1,4-diazepane-2,6-dione

1-((2R,3R,4R,5R)-3,4-bis((tert-butyldimethylsilyl)oxy)-5-((S)-hydroxy((2R,5R,6R)-6-hydroxy-5-(hydroxymethyl)-1-methyl-3-oxo-1,4-diazepan-2-yl)methyl)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione

(2R,5R,6R)-2-((S)-acetoxy((2R,3R,4R,5R)-3,4-bis((tert-butyldimethylsilyl)oxy)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)methyl)-5-(acetoxymethyl)-1-methyl-3-oxo-1,4-diazepan-6-yl acetate