You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-[(E)-(4,6-dimethylpyrimidin-2-yl)iminomethyl]-5-hydroxy-2-methylbenzo[g][1]benzofuran-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H21N3O4
assistant