Enamine
(1R,5R)-3-{[(9H-fluoren-9-yl)methoxy]carbonyl}-3-azabicyclo[3.1.0]hexane-1-carboxylic acid
Enamine
(1R,5R,6R)-3-{[(9H-fluoren-9-yl)methoxy]carbonyl}-3-azabicyclo[3.2.0]heptane-6-carboxylic acid
Enamine
(1R,5S)-2-{[(9H-fluoren-9-yl)methoxy]carbonyl}-2-azabicyclo[3.1.0]hexane-1-carboxylic acid