You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(trifluoromethyl)-5-[2-(trifluoromethyl)-6-[3-(trifluoromethyl)phenyl]phenoxy]phthalic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H11F9O5
assistant