title: Ethyl 1-cyclo-propyl-6,7-difluoro-8-meth-oxy-4-oxo-1,4-dihydro-quinoline-3-carboxyl-ate.
abstract: In the title compound, C(16)H(15)F(2)NO(4), the dihedral angle between the three-membered ring and the quinoline ring system is 64.3 (3)°. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules, forming a column running along [101].
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, College of Life Sciences and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors.forename: De-Cai
authors.initials: DC
authors.lastname: Wang
authors.forename: Xin-Ming
authors.initials: XM
authors.lastname: Huang
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Liu
authors.forename: Chun-Lei
authors.initials: CL
authors.lastname: Tang