You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [3-ethoxy-4-(pyridin-4-ylmethoxy)phenyl]-[4-(4-fluorophenyl)piperazin-1-yl]methanone by IUPAC nomenclature, provide its molecular formula.
user
C25H26FN3O3
assistant