N-(3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl-oxycarbonyl-, (4S,5R)-4-(4-benzyloxy-benzyl)-5-i-butyl-[(3,4-methylenedioxyphenyl)sulfonyl]-aminomethyl-2,2-dimethyl-oxazolidine

(3S)-6-bromo-1,3-isopropylidendioxyhexane

3,5-dichloro-L-tyrosine methyl ester