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 N-[(4S)-4-methyl-2,5-dioxo-4-phenylimidazolidin-1-yl]-2-morpholin-4-ylacetamide using the IUPAC nomenclature.
user
C16H20N4O4
assistant