(4S,5S)-5-benzyloxymethyl-3-N-tert-butoxycarbonyl-4-formyl-2,2-dimethyl-1,3-oxazolidine

(4R,5R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-5-((E)-pentadec-1-enyl)-oxazolidine-3-carboxylic acid tert-butyl ester

(4R,5R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-5-((Z)-pentadec-1-enyl)-oxazolidine-3-carboxylic acid tert-butyl ester