(-)-(3S,6R,9S,14aR)-6,9-dibenzyl-3-[(R)-7-hydroxy-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

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