You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[2-ethoxy-6-iodo-4-[(Z)-[[2-nitro-4-(trifluoromethyl)phenyl]hydrazinylidene]methyl]phenoxy]acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H19F3IN3O6
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