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 [2-[(quinoxalin-2-ylamino)methyl]piperidin-1-yl]-[2-(trifluoromethoxy)phenyl]methanone is given. What is its corresponding molecular formula?
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C22H21F3N4O2
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