You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(4R)-4-methyl-2,5-dioxo-4-(4-propylphenyl)imidazolidin-1-yl]-N-(2-methylphenyl)acetamide by IUPAC nomenclature, provide its molecular formula.
user
C22H25N3O3
assistant