You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl-[2-oxo-2-(4-propan-2-ylanilino)ethyl]-[2-oxo-2-[4-(trifluoromethoxy)anilino]ethyl]azanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H25F3N3O3+
assistant