You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(2-bromophenyl)methyl]-7-chloro-5-(3-ethyl-2-oxo-1H-benzimidazol-5-yl)-9-fluoro-1,3-dihydro-1,4-benzodiazepin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H19BrClFN4O2
assistant