You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[(2-chloro-6-fluorophenyl)methyl]piperazin-1-yl]-2-(2,3-dihydro-1,4-benzodioxin-3-ylmethyl)isoindole-1,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H25ClFN3O4
assistant