N-tert-butoxycarbonyl-(4S,1'R,4'S)-4-[4'-(tert-butyldimethylsilyloxy)-1'-hydroxy-2'-hexadecynyl]-2,2-dimethyl-1,3-oxazolidine

(2S,3R,6R)-3-benzyloxy-6-dodecyl-2-(methoxymethoxy)methylpiperidine

tert-butyl (4S)-2,2-dimethyl-4-(1'-oxo-4'-pentenyl)oxazolidine-3-carboxylate

tert-butyl (4S,1'R)-4-(1'-benzyloxy-4'-oxobutyl)-2,2-dimethyloxazolidine-3-carboxylate

(2S,3R,6R)-3-benzyloxy-6-dodecyl-1-(methoxycarbonyl)-2-(methoxymethoxy)methylpiperidine