You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[(4-chlorophenyl)methyl]-3-oxo-1,4-benzoxazin-6-yl]oxolane-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19ClN2O4
assistant