title: 3''-(2-Fluoro-benzyl-idene)-4'-(2-fluoro-phen-yl)-1'-methyl-dispiro-[acenaphthyl-ene-1,2'-pyrrolidine-3',1''-cyclo-penta-ne]-2,2''-dione.
abstract: In the title compound, C(33)H(25)F(2)NO(2), the acenaphthene ring system forms dihedral angles of 50.93 (14) and 36.89 (14)° with the benzene rings. The pyrrolidine and cyclo-penta-none rings adopt envelope (with the N atom as the flap) and twisted conformations, respectively. In the crystal, C-H⋯O and C-H⋯F inter-actions link the mol-ecules.
authors: Wenzhou Medical College, School of Pharmacy, Wenzhou 325035,  People's Republic of China.
authors: Gao-Zhi
authors: GZ
authors: Chen
authors: Xiao-Yan
authors: XY
authors: Wei
authors: Yi
authors: Y
authors: Wang
authors: Lu-Qing
authors: LQ
authors: Ren
authors: Xiao-Kun
authors: XK
authors: Li