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 (4R,5R)-1-butyl-3-(5-tert-butyl-1,3,4-thiadiazol-2-yl)-5-(4-chloro-3-methylphenyl)-4-hydroxyimidazolidin-2-one is given. What is its corresponding molecular formula?
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C20H27ClN4O2S
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