You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,5-difluoro-4-[[4-[2-(propan-2-yloxymethyl)pyrimidin-5-yl]phenyl]sulfonylamino]benzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H18F2N3O5S-
assistant