You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[[4-[2-(benzenesulfonamido)-3-[3-(3-chlorophenoxy)propylamino]-3-oxopropyl]phenyl]-difluoromethyl]phosphonic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H26ClF2N2O7PS
assistant