You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-oxo-2-[2-(4-sulfamoylphenyl)ethylamino]ethyl] 2-(furan-2-carbonylamino)benzoate by IUPAC nomenclature, provide its molecular formula.
user
C22H21N3O7S
assistant