(1r,3r)-3-(pyridin-2-yl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-(pyridin-4-yloxy)cyclobutan-1-amine dihydrochloride

(1r,3r)-3-(sulfanylmethyl)cyclobutan-1-ol

(1r,3r)-3-(tert-butoxy)cyclobutan-1-amine

(1r,3r)-3-(tert-butoxy)cyclobutan-1-amine hydrochloride

(1r,3r)-3-(tert-butoxy)cyclobutane-1-sulfonyl chloride

(1r,3r)-3-(tert-butoxy)cyclobutane-1-thiol

(1r,3r)-3-(trifluoromethoxy)cyclobutan-1-amine hydrochloride

(1r,3r)-3-(trifluoromethoxy)cyclobutane-1-carboxylic acid

(1r,3r)-3-(trifluoromethyl)cyclobutan-1-amine hydrochloride

(1r,3r)-3-(trifluoromethyl)cyclobutane-1-carboxylic acid

(1r,3r)-3-({1-[(tert-butoxy)carbonyl]piperidin-4-yl}oxy)cyclobutane-1-carboxylic acid

(1r,3r)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-(3-fluorophenyl)cyclobutane-1-carboxylic acid

(1r,3r)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-(3-methylphenyl)cyclobutane-1-carboxylic acid

(1r,3r)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1-phenylcyclobutane-1-carboxylic acid

(1r,3r)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutane-1-carboxylic acid

(1r,3r)-3-({[(tert-butoxy)carbonyl]amino}methyl)-3-fluorocyclobutane-1-carboxylic acid

(1r,3r)-3-({[(tert-butoxy)carbonyl]amino}methyl)cyclobutane-1-carboxylic acid

(1r,3r)-3-amino-1-(2-fluoro-6-methoxyphenyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(2-fluorophenyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(3-fluorophenyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(4-chlorophenyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(4-fluorophenyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(methylsulfanyl)cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-(trifluoromethyl)cyclobutan-1-ol hydrochloride

(1r,3r)-3-amino-1-fluorocyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-phenylcyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-1-[2-(difluoromethoxy)phenyl]cyclobutane-1-carboxylic acid hydrochloride

(1r,3r)-3-amino-2,2,4,4-tetramethylcyclobutan-1-ol

(1r,3r)-3-amino-2,2,4,4-tetramethylcyclobutan-1-ol hydrochloride

(1r,3r)-3-amino-3-(trifluoromethyl)cyclobutane-1-carboxylic acid

(1r,3r)-3-amino-N,N-dimethylcyclobutane-1-carboxamide hydrochloride

(1r,3r)-3-amino-N,N-dimethylcyclobutane-1-sulfonamide hydrochloride

(1r,3r)-3-amino-N-methylcyclobutane-1-carboxamide dihydrochloride

(1r,3r)-3-aminocyclobutan-1-ol hydrochloride

(1r,3r)-3-aminocyclobutane-1-carboxamide hydrochloride

(1r,3r)-3-aminocyclobutane-1-carboximidamide dihydrochloride

(1r,3r)-3-aminocyclobutane-1-carboxylic acid hydrochloride

(1R,3R)-3-aminocyclohexan-1-ol hydrochloride

(1R,3R)-3-aminocyclohexane-1-carboxylic acid hydrochloride

(1R,3R)-3-aminocyclopentane-1-carboxylic acid hydrochloride

(1r,3r)-3-azido-1-phenylcyclobutane-1-carbonitrile

(1r,3r)-3-azidocyclobutan-1-amine

(1r,3r)-3-azidocyclobutan-1-amine hydrochloride

(1r,3r)-3-azidocyclobutane-1-carboxylic acid