(S)-2-Ethoxycarbonylamino-3-[4-(4-methoxy-benzyloxy)-phenyl]-propionic acid methyl ester

{(S)-1-Hydroxymethyl-2-[4-(4-methoxy-benzyloxy)-phenyl]-ethyl}-methyl-carbamic acid tert-butyl ester

(S)-3-(4-Benzyloxy-phenyl)-2-{(S)-3-[4-(4-methoxy-benzyloxy)-phenyl]-2-methylamino-propylamino}-propionic acid methyl ester