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-[2-(cyclopentylamino)-2-oxoethyl]sulfanyl-1,3,4-thiadiazol-2-yl]naphthalene-1-carboxamide into molecular formula.
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C20H20N4O2S2
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