1-(4(S)-Benzyl-2-oxo-oxazolidin-3-yl)-hexane-1,5-dione

(E)-(4R,5R)-5-(tert-Butyl-dimethyl-silanyloxy)-4-methyl-7-triethylsilanyl-hept-2-en-6-ynoic acid ethyl ester

(S)-4-Benzyl-3-[4-(2-methyl-[1,3]dithian-2-yl)-butyryl]-oxazolidin-2-one

(S)-1-[(S)-2-Benzyloxycarbonylamino-3-(3-tert-butoxycarbonyloxy-phenyl)-propionyl]-hexahydro-pyridazine-3-carboxylic acid methyl ester