[(1R,2S)-2-Hydroxy-1-(4-methoxy-phenyl)-2-((S)-2-oxo-[1,3]dioxolan-4-yl)-ethyl]-carbamic acid tert-butyl ester

2R-amino-1-(tert-butyldimethylsiloxy)methyl-2-(4-methoxyphenyl)-(1R)-ethyl 4-nitrobenzoate

Phenyl-carbamic acid (2R,3S)-3-[(R)-tert-butoxycarbonylamino-(4-methoxy-phenyl)-methyl]-oxiranylmethyl ester