(2S)-3-{[(2S,3R)-3-(tert-butoxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]oxy}-2-{[(tert-butoxy)carbonyl]amino}propanoic acid

(2S)-3-{[(2S,3R)-3-(tert-butoxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]oxy}-2-{[(tert-butoxy)carbonyl]amino}propanoic acid