(S)-2-(((Benzyloxy)carbonyl)amino)-3-(4-((2,2,10,10-tetramethyl-4,8-dioxo-3,9-dioxa-5,7-diazaundecan-6-ylidene)amino)phenyl)propanoic acid

(S)-2-(((Benzyloxy)carbonyl)amino)-3-(4-((2,2,10,10-tetramethyl-4,8-dioxo-3,9-dioxa-5,7-diazaundecan-6-ylidene)amino)phenyl)propanoic acid,