(S)-9-[(R)-3-((S)-1-tert-Butoxycarbonylamino-ethyl)-pyrrolidin-1-yl]-8-fluoro-3-methyl-6-oxo-2,3-dihydro-6H-1-oxa-3a-aza-phenalene-5-carboxylic acid

(R)-1-((S)-1-Benzyl-pyrrolidin-3-yl)-ethylamine

4-(R)-(1-(S)-aminoethyl)-1-benzyl-2-pyrrolidone