You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2Z)-2-[2-[[2,4-dichloro-5-[(2,2-dichlorocyclopropyl)methoxy]phenoxy]methyl]phenyl]-2-methoxyiminoacetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H17Cl4NO5
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