(+/-)-4-nitro-benzoic acid-(trans-2-hydroxy-cyclopentylamide)
(+/-)-4-nitro-benzoic acid-(cis-2-hydroxy-cyclopentylamide)
(+/-)-4-nitro-benzoic acid-(trans-2-chloro-cyclopentylamide)
4-nitro-benzoyl chloride
(+/-)-4-nitro-benzoic acid-(cis-2-chloro-cyclopentylamide)