(S)-6-(Benzyloxy-formyl-amino)-2-[(1-{(2S,3S)-2-[(R)-2-tert-butoxycarbonylamino-3-(4-methoxy-phenyl)-propionylamino]-3-methyl-pentanoyl}-piperidine-2-carbonyl)-amino]-hexanoic acid

(S)-2-Amino-6-(benzyloxy-formyl-amino)-hexanoic acid

N-Benzyloxy-N-{4-[(6S,9R,12S,14aR)-6-((S)-sec-butyl)-9-(4-methoxy-benzyl)-5,8,11,14-tetraoxo-tetradecahydro-4a,7,10,13-tetraaza-benzocyclododecen-12-yl]-butyl}-formamide

N-Benzyloxy-N-{4-[(6S,9R,12S,14aS)-6-((S)-sec-butyl)-9-(4-methoxy-benzyl)-5,8,11,14-tetraoxo-tetradecahydro-4a,7,10,13-tetraaza-benzocyclododecen-12-yl]-butyl}-formamide

(S)-2-[(1-{(2S,3S)-2-[(R)-2-Amino-3-(4-methoxy-phenyl)-propionylamino]-3-methyl-pentanoyl}-piperidine-2-carbonyl)-amino]-6-(benzyloxy-formyl-amino)-hexanoic acid