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'-ethyl-N'-[4-(ethylaminomethyl)-2,5-dimethylpyrazol-3-yl]-N,N-dimethylpropane-1,3-diamine by IUPAC nomenclature, provide its molecular formula.
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C15H31N5
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