You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [2-(4-acetylpiperazin-1-yl)-2-oxoethyl] 2-(4-methoxyphenyl)-4-methyl-1,3-thiazole-5-carboxylate into molecular formula.
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C20H23N3O5S
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