Butanoic acid, 4-[[1-(4,4-dimethyl-2,6-dioxocyclohexylidene)-3-methylbutyl]amino]-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-, (2S)-
(2S)-4-[[1-(4,4-Dimethyl-2,6-dioxocyclohexylidene)-3-methylbutyl]amino]-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]butanoic acid
(2S)-4-[[1-(4,4-Dimethyl-2,6-dioxocyclohexylidene)-3-methylbutyl]amino]-2-(9H-fluoren-9-ylmethoxycarbonylamino)butanoic acid