You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(3-chloro-2-methylphenyl)-5-(1-pyridin-3-ylethylsulfanyl)-1,3,4-thiadiazol-2-amine by IUPAC nomenclature, provide its molecular formula.
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C16H15ClN4S2
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