You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (6R)-N-(2-bromo-3-fluoropyridin-4-yl)-3-cyclopentyl-6-methyl-1,4,6,7-tetrahydropyrazolo[4,3-c]pyridine-5-carboxamide is given. What is its corresponding molecular formula?
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C18H21BrFN5O
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