You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[3-(5-chlorothiophen-2-yl)-1-(dimethylamino)prop-1-en-2-yl]-N-propan-2-ylpyrimidin-2-amine into its molecular formula.
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C16H21ClN4S
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