methyl 3-((6S,9S,12S)-6,9-dibenzyl-12-isobutyl-4,7,10,13-tetraoxo-4,5,6,7,8,9,10,11,12,13,14,15-dodecahydrofuro[2,3-l][1,4,7,10]tetraazacyclotetradecine-2-carboxamido)propanoate

4-(tert-butyl) 2-methyl 5-((4S,7S,10S)-7,10-dibenzyl-4-isobutyl-14,14-dimethyl-3,6,9,12-tetraoxo-13-oxa-2,5,8,11-tetraazapentadecyl)furan-2,4-dicarboxylate

(6S,9S,12S)-6,9-dibenzyl-N-(3-hydroxypropyl)-12-isobutyl-4,7,10,13-tetraoxo-4,5,6,7,8,9,10,11,12,13,14,15-dodecahydrofuro[2,3-l][1,4,7,10]tetraazacyclotetradecine-2-carboxamide