You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(3-chloro-2,4-difluorophenyl)-1-(2-hydroxyethyl)-N-methyl-3-[6-methyl-4-(trifluoromethyl)pyridin-2-yl]-2-oxoimidazolidine-4-carboxamide .
user
C20H18ClF5N4O3
assistant