6-Fluoro-4-hydroxyquinoline , its cas register number is 391-78-6. It also can be called 4-Hydroxy-6-Fluoroquinoline ; 6-Fluoroquinolin-4-Ol ; 6-Fluoro-4(1h)-Quinolinone ; 6-Fluoro-4-Hydroxyquinoline ; Buttpark 13\01-64 .