[(S)-3-(tert-Butyl-dimethyl-silanyloxy)-3-(4-methoxy-phenyl)-propyl]-[(S)-3-hydroxy-1-(4-methoxy-phenyl)-propyl]-carbamic acid tert-butyl ester

(4R)-O-propionyl-N-<(1,1-dimethylethoxy)carbonyl>-D,L-<4-2H>homoserine