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 N-(5-ethyl-1,3,4-thiadiazol-2-yl)-2-[[(7R)-7-methyl-2-propan-2-yl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl]sulfanyl]acetamide into molecular formula.
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C20H25N5OS3
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