You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [4-(difluoromethoxy)-3-ethoxyphenyl]-[4-[(4-methoxyphenyl)methyl]piperazin-4-ium-1-yl]methanone is given. What is its corresponding molecular formula?
user
C22H27F2N2O4+
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