You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[(4R)-4-methyl-2,5-dioxo-4-phenylimidazolidin-1-yl]-N,N-di(propan-2-yl)acetamide using the IUPAC nomenclature.
user
C18H25N3O3
assistant