(S)-5-Allyl-1-[(S)-1-(2-hydroxy-phenyl)-ethyl]-pyrrolidin-2-one

1-{(R)-1-[(S)-1-(2-Methoxy-phenyl)-ethyl]-pyrrolidin-2-yl}-heptan-4-one

(S)-1-[(S)-1-(2-Methoxy-phenyl)-ethyl]-5-((E)-4-oxo-dec-2-enyl)-pyrrolidin-2-one

(R)-1-[(S)-1-(2-Methoxy-phenyl)-ethyl]-5-(4-oxo-decyl)-pyrrolidin-2-one

1-{(R)-1-[(S)-1-(2-Methoxy-phenyl)-ethyl]-pyrrolidin-2-yl}-decan-4-one