(1R,2'R)-{2-[2'-(tert-butyldiphenylsilanyloxy)-2'-carbamoylethyl]-2-methylpropyl}carbamic acid benzyl ester

(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

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