You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[1-[6-fluoro-5-(trifluoromethyl)-3,4-dihydropyridin-2-yl]piperidin-4-yl]-4-hydroxy-4-(trifluoromethyl)-5,7-dihydro-2H-pyrazolo[3,4-b]pyridin-6-one by IUPAC nomenclature, provide its molecular formula.
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C18H18F7N5O2
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