You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl N-[4-[[[(3-ethoxy-4-methoxyanilino)-(ethylamino)methylidene]amino]methyl]phenyl]carbamate;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H29IN4O4
assistant