You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[4-[2-chloro-4-(trifluoromethyl)phenoxy]phenoxy]-1-cyanopropyl] 3-sulfanylidenepropanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H15ClF3NO4S
assistant