1-[(tert-butoxy)carbonyl]-4-methylazetidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-methylidenepiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-methylpiperazine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-methylpiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-methylpiperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-oxopyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-phenoxypiperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-phenylpiperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-propoxypiperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-propylpiperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(2-chlorophenyl)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(3-chlorophenyl)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(3-fluorophenyl)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(4-fluorophenyl)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[(prop-2-en-1-yloxy)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)methyl]piperidine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)ethyl]pyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-{[(9H-fluoren-9-yl)methoxy]carbonyl}-1,4-diazepane-6-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-{[(9H-fluoren-9-yl)methoxy]carbonyl}-2-methylpiperazine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-4-{[(9H-fluoren-9-yl)methoxy]carbonyl}piperazine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-difluoropiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-difluoropiperidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethyl-1-azaspiro[3.3]heptane-6-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethyl-2,5-dihydro-1H-pyrrole-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethylpiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethylpiperidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethylpyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,5-dimethylpyrrolidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5,6-dimethoxy-2,3-dihydro-1H-indole-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(2,4-difluorophenyl)pyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(4-methoxyphenyl)pyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(dimethylphosphoryl)piperidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(ethoxycarbonyl)pyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(methoxycarbonyl)piperidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(methoxymethyl)-5-methylpyrrolidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(methoxymethyl)pyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(trifluoromethyl)-1H-pyrrole-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-(trifluoromethyl)piperidine-3-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-cyclohexylpiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-cyclopropylpyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-ethynylpyrrolidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-fluoro-1,2,3,6-tetrahydropyridine-4-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-fluoro-2,3-dihydro-1H-indole-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-fluoro-6-methoxypiperidine-2-carboxylic acid

1-[(tert-butoxy)carbonyl]-5-fluoropiperidine-2-carboxylic acid