You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-chloro-5-(trifluoromethyl)-N-[(2,3,4-trimethoxyphenyl)methylideneamino]pyridin-2-amine by IUPAC nomenclature, provide its molecular formula.
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C16H15ClF3N3O3
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