You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4-fluorophenyl)methylamino]-1-[4-[6-(3-methoxyphenyl)pyridazin-3-yl]-1,4-diazepan-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H28FN5O2
assistant