You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-5-chloro-N-[1-(furan-3-carbonyl)-2,3-dihydroindol-5-yl]-2,3-dihydro-1-benzofuran-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H17ClN2O4
assistant