You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[[3-cyclopropyl-6-oxo-5-(trifluoromethyl)pyridazin-1-yl]methyl]-3-fluorobenzonitrile by IUPAC nomenclature, provide its molecular formula.
user
C16H11F4N3O
assistant