(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-5-((8,12-dioxo-7,13-dioxa-9,11-diazanonadecan-10-ylidene)amino)pentanoic acid 1g

(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-5-((8,12-dioxo-7,13-dioxa-9,11-diazanonadecan-10-ylidene)amino)pentanoic acid 1g