You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 6-[4-[(4-ethylsulfonylpiperazin-1-yl)methyl]-1H-pyrazol-5-yl]-1-methyl-3,4-dihydroquinolin-2-one into molecular formula.
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C20H27N5O3S
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