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

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