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-N-butyl-4-N-[4-chloro-3-(trifluoromethyl)phenyl]-5-nitropyrimidine-4,6-diamine is given. What is its corresponding molecular formula?
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C15H15ClF3N5O2
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