You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-ethyl-1-[3-(4-methylthiophen-3-yl)-1,2,4-oxadiazol-5-yl]cyclohexan-1-amine by IUPAC nomenclature, provide its molecular formula.
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C15H21N3OS
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