You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5R)-5-methyl-1-(4-methylphenyl)-3-[[(3S)-3-methylpiperidin-1-yl]methyl]imidazolidine-2,4-dione .
user
C18H25N3O2
assistant