You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 3-carbamimidoyl-4-[1-(3-methoxy-3-oxopropyl)-2-oxo-3-piperidin-4-ylimidazolidin-1-ium-1-yl]benzoate by IUPAC nomenclature, provide its molecular formula.
user
C21H30N5O5+
assistant