You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(5-benzylsulfanyl-1,3,4-thiadiazol-2-yl)-3-[2-(dimethylamino)-2-oxoethoxy]benzamide into molecular formula.
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C20H20N4O3S2
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