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 1-[4-(4-chloro-3-methoxyphenyl)-2-(methoxymethyl)piperazin-1-yl]-2-[4-chloro-5-methyl-3-(trifluoromethyl)pyrazol-1-yl]ethanone into molecular formula.
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C20H23Cl2F3N4O3
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