(2S,4R)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-(3-((2,2,10,10-tetramethyl-4,8-dioxo-3,9-dioxa-5,7-diazaundecan-6-ylidene)amino)propoxy)pyrrolidine-2-carboxylic acid 1g

(2S,4R)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-(3-((2,2,10,10-tetramethyl-4,8-dioxo-3,9-dioxa-5,7-diazaundecan-6-ylidene)amino)propoxy)pyrrolidine-2-carboxylic acid 1g