(1R,2S,9S)-7,11-diazatricyclo[7.3.1.0,2,7]tridecane dihydrochloride

(1R,3aS,3bR,9aR,9bS,11aS)-9a,11a-dimethyl-2,3,3a,3b,7,8,9,9a,9b,10,11,11a-dodecahydrospiro[cyclopenta[a]phenanthrene-1,2'-oxolane]-5',7-dione

(1R,3aS,3bR,9bS,11aS)-1-ethynyl-11a-methyl-1H,2H,3H,3aH,3bH,4H,5H,9bH,10H,11H,11aH-cyclopenta[a]phenanthrene-1,7-diol

(1R,3aS,3bS,7S,9aR,9bS,11aR)-1-[(2R,3E,5S)-5-ethyl-6-methylhept-3-en-2-yl]-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-ol

(1R,3aS,3bS,7S,9aR,9bS,11aR)-1-[(2R,5R)-5-ethyl-6-methylheptan-2-yl]-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-ol

(1R,3aS,3bS,7S,9aR,9bS,11aR)-9a,11a-dimethyl-1-[(2R)-6-methylheptan-2-yl]-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-ol

(1R,3aS,3bS,7S,9aR,9bS,11aR)-9a,11a-dimethyl-1-[(2R)-6-methylheptan-2-yl]-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-yl carbonochloridate

(1R,3aS,3bS,9aR,9bS,10S,11aS)-1,10-dihydroxy-1-(2-hydroxyacetyl)-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one

(1R,3aS,3bS,9aR,9bS,10S,11aS)-1,10-dihydroxy-1-(2-hydroxyacetyl)-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,5H,7H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one

(1R,3aS,3bS,9aR,9bS,11aR)-9a,11a-dimethyl-1-[(2R)-6-methylheptan-2-yl]-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-one

(1R,3aS,3bS,9aR,9bS,11aS)-1-hydroxy-1-(2-hydroxyacetyl)-9a,11a-dimethyl-1H,2H,3H,3aH,3bH,4H,5H,7H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthrene-7,10-dione

(1r,3r)-1-(2,3-difluorophenyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutane-1-carboxylic acid

(1r,3r)-1-(2,6-difluorophenyl)-3-fluorocyclobutane-1-carboxylic acid

(1r,3r)-1-(2-bromoethyl)-3-methoxycyclobutane

(1r,3r)-1-(3,5-difluorophenyl)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutane-1-carboxylic acid

(1r,3r)-1-(bromomethyl)-3-(methylsulfanyl)cyclobutane

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

(1r,3r)-1-(bromomethyl)-3-methoxycyclobutane

(1r,3r)-1-(tert-butoxy)-3-chlorocyclobutane

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

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

(1R,3R)-1-amino-2,2-dimethyl-3-phenylcyclobutane-1-carboxylic acid hydrochloride

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

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

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

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

(1r,3r)-1-azido-3-ethoxycyclobutane

(1r,3r)-1-bromo-3-(methoxymethyl)cyclobutane

(1r,3r)-1-bromo-3-(propan-2-yloxy)cyclobutane

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

(1r,3r)-1-bromo-3-(trifluoromethyl)cyclobutane

(1r,3r)-1-bromo-3-ethoxycyclobutane

(1r,3r)-1-bromo-3-methanesulfonylcyclobutane

(1r,3r)-1-bromo-3-methoxycyclobutane

(1r,3r)-1-ethoxy-3-isocyanatocyclobutane

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

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

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

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

(1r,3r)-2,2,4,4-tetramethylcyclobutane-1,3-diol

(1r,3r)-3-(1,2-oxazol-3-yl)cyclobutan-1-amine hydrochloride

(1r,3r)-3-(1H-1,2,3-triazol-1-yl)cyclobutan-1-amine dihydrochloride

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

(1r,3r)-3-(1H-1,2,4-triazol-1-yl)cyclobutan-1-amine dihydrochloride

(1r,3r)-3-(1H-1,2,4-triazol-1-yl)cyclobutan-1-ol hydrochloride