You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-hydroxy-N-(4-methyl-1-oxo-2,3-benzoxazin-6-yl)-2-(4-nitrophenyl)-2-phenylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H17N3O6
assistant