You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-benzyl-5-[4-(6-nitro-4-oxo-2H-1,3-benzoxazin-3-yl)butoxy]-1,3-thiazolidine-2,4-dione into its molecular formula.
user
C22H21N3O7S
assistant