You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(E)-(3,4-dihydroxy-5-methoxyphenyl)methylideneamino]-5-(4-methoxyphenyl)-5-methylimidazolidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19N3O6
assistant