You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(8R)-8-methyl-3-(2-methyl-4H-imidazol-5-yl)-6,8-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrazin-7-yl]-(3,4,5-trifluorophenyl)methanone by IUPAC nomenclature, provide its molecular formula.
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C17H15F3N6O
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