You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5E)-1-(4-chloro-2,5-dimethoxyphenyl)-5-[(3-chloro-5-methoxy-4-prop-2-enoxyphenyl)methylidene]-1,3-diazinane-2,4,6-trione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H20Cl2N2O7
assistant