You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [4-[2-(3-chlorophenyl)ethynyl]-4-hydroxypiperidin-1-yl]-(2,3-dihydro-1-benzofuran-6-yl)methanone into molecular formula.
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C22H20ClNO3
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