You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[4-(2,4-dimethyl-1,3-thiazol-5-yl)pyrimidin-2-yl]-3-(3-nitrophenyl)aniline by IUPAC nomenclature, provide its molecular formula.
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C21H17N5O2S
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