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-(3-chloro-4-fluorophenyl)-2-[(4R)-4-(2,5-difluorophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetamide ?
user
C18H13ClF3N3O3
assistant