You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-bromo-3-methyl-N-[4-methyl-2-(oxolan-2-ylmethoxy)phenyl]-1-benzofuran-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C22H22BrNO4
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