You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-methylpropyl 4-[2-oxo-2-[4-(trifluoromethoxy)anilino]ethyl]piperazin-4-ium-1-carboxylate .
user
C18H25F3N3O4+
assistant