You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[(E)-[4-(dimethylamino)phenyl]methylideneamino]-3-(3,4-dimethylphenyl)-1H-pyrazole-5-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C21H23N5O
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