You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N'-(5,6-dimethylthieno[2,3-d]pyrimidin-4-yl)-N'-methyl-N-(2-methylpropyl)ethane-1,2-diamine into molecular formula.
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C15H24N4S
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