2-[(1R,3R)-3-Benzyloxycarbonylamino-1-(tert-butyl-diphenyl-silanyloxy)-4-methyl-pentyl]-oxazole-4-carboxylic acid

(2R,4R)-4-benzyloxycarbonylamino-2-(tert-butyldiphenylsilanyloxy)-5-methylhexanoic acid methyl ester

(2S,2'R,4'R)-2-[4'-benzyloxycarbonylamino-2'-(tert-butyldiphenylsilanyloxy)-5'-methylhexanoylamino]-3-hydroxypropionic acid methyl ester

(4S,1'R,3'R)-2-[3'-benzyloxycarbonylamino-1'-(tert-butyldiphenylsilanyloxy)-4'-methylpentyl]-4,5-dihydrooxazole-4-carboxylic acid methyl ester

(2R,4R)-4-benzyloxycarbonylamino-2-hydroxy-5-methylhexanoic acid methyl ester

(4S)-4-benzyloxycarbonylamino-5-methylhex-2-enoic acid methyl ester

(4R)-4-benzyloxycarbonylamino-5-methylhexanoic acid methyl ester