You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-(furan-2-yl)-N-[2-methyl-1-(1-methylbenzimidazol-2-yl)propyl]-1H-pyrazole-3-carboxamide into molecular formula.
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C20H21N5O2
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