(R)-3-Benzyloxy-2-[((2R,4R,5R,6R)-5-hydroxy-5,6-dimethyl-2-phenyl-[1,3]dioxane-4-carbonyl)-amino]-2-methyl-propionic acid methyl ester

2,4-O-benzylidene-5-deoxy-3-C-methyl-D-ribonic acid

2,4-di-O-benzyl-3,5-dideoxy-3-methyl-D-ribose diethyl dithioacetal

(R)-3-Benzyloxy-2-((2R,3R,4R)-2,4-bis-benzyloxy-3-methyl-pentanoylamino)-2-methyl-propionic acid