You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3',6'-dihydroxy-N-[[3-[(4-methylphenyl)methylcarbamoyl]phenyl]methyl]-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C37H28N2O7
assistant