(S)-3-{(S)-2-Azido-3-[3-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-propionyl}-4-benzyl-oxazolidin-2-one

3-[3-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-propionic acid benzyl ester

3-[3-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-phenyl]-propionic acid

3-(3-hydroxy-4-methoxyphenyl)propionic acid benzyl ester

(2S)-2-azido-3-(3-hydroxy-4-methoxyphenyl)propionic acid 2-bromoethyl ester