You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-(2-chlorophenyl)-3-[3,5-dichloro-4-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxyphenyl]-1,3,5-oxadiazine-2,4-dione into its molecular formula.
user
C21H8Cl4F3N3O4
assistant