You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-ethyl-4-(2-propan-2-ylpyrimidin-4-yl)-4,5,6,7-tetrahydro-1,3-benzothiazole by IUPAC nomenclature, provide its molecular formula.
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C16H21N3S
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