You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (E)-6-[6-methoxy-4-(4-methoxy-4-oxobutanoyl)oxy-7-methyl-3-oxo-1H-2-benzofuran-5-yl]-4-methylhex-4-enoate into molecular formula.
user
C22H25O9-
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