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

2-((1R,3R)-1-Acetoxy-3-benzyloxycarbonylamino-4-methyl-pentyl)-thiazole-4-carboxylic acid

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

(1R,2'R,1'''R,3'''S)-{1-[2'-{4''-[1'''-benzyl-4'''-(tert-butyldiphenylsilanyloxy)-3'''-methylbutylcarbamoyl]thiazol-2''-yl}-2'-(tert-butyldiphenylsilanyloxy)ethyl]-2-methylpropyl}carbamic acid benzyl ester

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

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

(1R,3R)-acetic acid 3-benzyloxycarbonylamino-1-carbamoyl-4-methylpentyl ester

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

(1R,3R,1''R,3''S)-acetic acid 1-[4'-(1''-benzyl-4''-hydroxy-3''-methylbutylcarbamoyl)thiazol-2'-yl]-3-benzyloxycarbonylamino-4-methylpentyl ester