(S)-2-tert-Butoxycarbonylamino-3-[4-(3,6-dioxo-cyclohexa-1,4-dienyloxy)-phenyl]-propionic acid benzyl ester
2-bromo-1,4-benzoquinone
tert-butyldimethylsilyl chloride
(S)-2-tert-Butoxycarbonylamino-3-[4-(2,5-dihydroxy-phenoxy)-phenyl]-propionic acid benzyl ester
N-tert-butoxycarbonyl-L-tyrosine benzyl ester
(S)-2-tert-Butoxycarbonylamino-3-{4-[5-((R)-2,3-dihydroxy-propyl)-2-methoxy-phenoxy]-phenyl}-propionic acid benzyl ester
(S)-3-(4-{5-[(S)-2-Azido-3-(tert-butyl-dimethyl-silanyloxy)-propyl]-2-methoxy-phenoxy}-phenyl)-2-tert-butoxycarbonylamino-propionic acid benzyl ester
(S)-2-tert-Butoxycarbonylamino-3-[4-(2-methoxy-5-trifluoromethanesulfonyloxy-phenoxy)-phenyl]-propionic acid benzyl ester
(S)-2-tert-Butoxycarbonylamino-3-(4-{5-[(R)-3-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-propyl]-2-methoxy-phenoxy}-phenyl)-propionic acid benzyl ester
(S)-3-[4-(5-Allyl-2-methoxy-phenoxy)-phenyl]-2-tert-butoxycarbonylamino-propionic acid benzyl ester