(S)-14-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2,2-dimethyl-4,8-dioxo-3,6-dioxa-5,9-diazapentadecan-15-oic acid

(S)-14-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2,2-dimethyl-4,8-dioxo-3,6-dioxa-5,9-diazapentadecan-15-oic acid,