You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 5-[(Z)-1-aminoprop-1-enyl]-N-butan-2-yl-4-(3,4-dichlorophenyl)-6-methylsulfanylpyrimidin-2-amine into its molecular formula.
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C18H22Cl2N4S
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