You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-acetamido-3-(4-chlorophenyl)-N-[2-(2,3-dihydro-1H-inden-5-yloxy)ethyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H25ClN2O3
assistant