You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,4-dimethylphenyl)-2-[3-[(1S,2R)-2-methylcyclohexyl]-2,4,5-trioxoimidazolidin-1-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N3O4
assistant