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 1-[(3S)-3-(furan-2-yl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-piperidin-1-ium-1-ylethanone is given. What is its corresponding molecular formula?
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C21H26N3O3+
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