Butanoic acid, 4-[[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]amino]-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, (2S)-

Butanoic acid, 4-[[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl]amino]-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, (2S)-