You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(4-fluorophenyl)-3-(2-hydroxy-3-naphthalen-2-yloxypropyl)-5-methylimidazolidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H21FN2O4
assistant