You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-chloro-N-methyl-N-(oxan-4-yl)-6,7-dihydrothieno[3,2-d]pyrimidin-4-amine;ethane is the IUPAC name of a molecule. Please give its molecular formula.
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C16H28ClN3OS
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