You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[5-[(E)-3-[3-(3-methyl-1-benzofuran-2-yl)azetidin-1-yl]-3-oxoprop-1-enyl]pyridin-2-yl]acetamide into molecular formula.
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C22H21N3O3
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