You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-chloro-4-[3-(4-chloro-3-fluorophenoxy)propyl]piperazin-1-yl]-1-benzofuran-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22Cl2FN3O3
assistant