4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(1-(4,4-dimethyl-2,6-dioxocyclohexylidene)-3-methylbutyl)piperidine-4-carboxylic acid 1g

4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-1-(1-(4,4-dimethyl-2,6-dioxocyclohexylidene)-3-methylbutyl)piperidine-4-carboxylic acid 1g