8-Azabicyclo[3.2.1]octane-2-carboxylic acid, 8-[3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)propyl]-3-(4-fluorophenyl)-, 3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)propyl ester, (1R,2S,3R,5S)-rel-