You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[(4R)-4-methyl-2,5-dioxo-4-phenylimidazolidin-1-yl]-4-oxo-4-thiophen-2-ylbutanamide ?
user
C18H17N3O4S
assistant