You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[2-[(4R)-2',5'-dioxospiro[2,3-dihydro-1H-naphthalene-4,4'-imidazolidine]-1'-yl]acetyl]amino]-N,N-diethylbenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H28N4O4
assistant