(R)-1-((S)-2-{[1-((S)-7-Benzyloxycarbonyl-2-tert-butoxycarbonylamino-heptanoylamino)-indane-1-carbonyl]-amino}-3-phenyl-propionyl)-pyrrolidine-2-carboxylic acid tert-butyl ester

S-((7R)-7-((tert-butyldimethylsilyl)oxy)-1-((3S,6R,9S,14aR)-6,9-dibenzyl-6-methyl-1,4,7,10-tetraoxotetradecahydropyrrolo[1,2-a][1,4,7,10]tetraazacyclododecin-3-yl)-6-oxooctan-3-yl) O-ethyl carbonodithioate

(3S,6S,9S,14aR)-6,9-dibenzyl-3-((R)-7-((tert-butyldimethylsilyl)oxy)-6-oxooctyl)-6-methyldecahydropyrrolo[1,2-a][1,4,7,10]tetraazacyclododecine-1,4,7,10-tetraone

(3S,6R,9S,14aR)-6,9-dibenzyl-3-((R)-7-((tert-butyldimethylsilyl)oxy)-6-oxooctyl)-6-methyldecahydropyrrolo[1,2-a][1,4,7,10]tetraazacyclododecine-1,4,7,10-tetraone

(5S,11S,13aR)-5-Benzyl-11-[7-(tert-butyl-dimethyl-silanyloxy)-6-oxo-heptyl]-8,8-dimethyl-decahydro-3a,6,9,12-tetraaza-cyclopentacyclododecene-4,7,10,13-tetraone