You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 5-[[[furan-2-ylmethyl(thiophen-2-ylmethyl)carbamoyl]amino]methyl]-2-methoxybenzoate by IUPAC nomenclature, provide its molecular formula.
user
C21H22N2O5S
assistant