(4'S,5'R,6'R)-4-6'-1,4-dihydroxy-2-methyl-3-methylene-butyryl-5'-tert-butyldimethylsiloxy-1'-3'-dioxan-4'-yl-2,6-piperidinedione
tert-butylchlorodiphenylsilane
3,5-di-O-benzyl-1,2-O-isopropylidene-α-D-xylofuranose
3,5-di-O-benzyl-D-xylofuranose
(E,4S,5R,6R)-methyl 5,7-di(benzyloxy)-4,6-dihydroxy-2-heptenoate