(2R,4S,5R)-2-((R)-1,2-Bis-benzyloxy-ethyl)-4-methyl-5-phenyl-3-(toluene-4-sulfonyl)-oxazolidine

S-tert-Butyl (2S,3R)-2-(benzyloxy)-3-<<<(S)-1-phenylethyl>amino>carboxy>-6-methyl-4-heptynethioate

S-tert-Butyl (2R,3S)-2-(benzyloxy)-3-<<<(S)-1-phenylethyl>amino>carboxy>-6-methyl-4-heptynethioate