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 6-chloro-N-[1-(2,5-dimethylthiophen-3-yl)ethyl]-5-nitropyrimidin-4-amine is given. What is its corresponding molecular formula?
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C12H13ClN4O2S
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