title: 4-(2-Fluoro-benzo-yl)-1-[2-(4-hy-droxy-phen-yl)-2-oxoeth-yl]piperazin-1-ium trifluoro-acetate.
abstract: In the crystal structure of the title compound, C(19)H(20)FN(2)O(3) (+)·C(2)F(3)O(2) (-), N-H⋯O and O-H⋯O hydrogen bonds link two cations and two anions into a 22-atom ring. These rings are further linked into a three dimensional network by weak C-H⋯O contacts.
authors.affiliation: College of Chemical Science and Technology, Yunnan University, Kunming City,  People's Republic of China.
authors.forename: Fuyong
authors.initials: F
authors.lastname: Bian
authors.forename: Yi
authors.initials: Y
authors.lastname: Jin
authors.forename: Shaoming
authors.initials: S
authors.lastname: Chi
authors.forename: Guojun
authors.initials: G
authors.lastname: Shi
authors.forename: Sichuan
authors.initials: S
authors.lastname: Xu