(4S,5R,1'S,E)-4-[4'-benzyloxy-1'-(hydroxy)but-2'-enyl]-5-(benzyloxy)methyloxazolidin-2-one

ethyl (4S,4'S,5'S,Z)-4-[5'-(tertbutyldimethylsilyloxy)methyl-3'-methyl-2'-oxooxazolidin-4'-yl]-4-(tert-butyldimethylsilyloxy)but-2-enoate

(4R,5S,1'S,E)-4-[1'-benzoyloxy-2'-(benzyloxy)ethyl]-5-[3''-(benzyloxy)-prop-1''-enyl]oxazolidin-2-one

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

(4R,5S)-4-[(E)-(S)-4-Benzyloxy-1-(tert-butyl-dimethyl-silanyloxy)-but-2-enyl]-5-benzyloxymethyl-oxazolidin-2-one