(3aS,6R,7R,7aR)-1-methyl-7-triethylsilyloxy-6-[(2-trifluoromethanesulfonyloxy)prop-2-enyl]hexahydropyrano[4,3-d]oxazol-2-one

(3a'S,6'R,7'R,7a'S)-N-methoxy-N-methyl-2-[1'-methyl-2'-oxo-7'-(triethylsilyloxy)hexahydropyrano[4,3-d]oxazol-6'-yl]acetamide

(4S,5S,1'S,E)-4-[4'-benzyloxy-1'-(tert-butyldimethylsilyloxy)but-2'-enyl]-5-(benzyloxy)methyl-3-methyloxazolidin-2-one

methyl (2S,4R,3a'S,6'R,7'R,7a'S)-4,5-epoxy-2-methoxycarbonylamino-4-[[1'-methyl-2'-oxo-7'-(triethylsilyloxy)hexahydropyrano[4,3-d]oxazol-6'-yl]methyl]pentanoate

(R)-(tert-Butyl-dimethyl-silanyloxy)-[(4R,5S)-5-(tert-butyl-dimethyl-silanyloxymethyl)-3-methyl-2-oxo-oxazolidin-4-yl]-acetaldehyde