You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1-tert-butyl-3-(2,4-difluorophenyl)-N-[3-(propan-2-ylamino)propyl]pyrazole-4-carboxamide;hydrochloride into molecular formula.
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C20H29ClF2N4O
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