You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N-[[6-(diethylamino)pyridin-3-yl]methyl]-6-methylthieno[2,3-d]pyrimidin-4-amine is given. What is its corresponding molecular formula?
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C17H21N5S
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