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 [(3R)-3-(diethylamino)pyrrolidin-1-yl]-(6-phenylimidazo[2,1-b][1,3]thiazol-3-yl)methanone is given. What is its corresponding molecular formula?
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C20H24N4OS
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