You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[7-[[bis[(2,4-difluorophenyl)methyl]amino]methyl]-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-2-(furan-2-yl)-[1,2,4]triazolo[1,5-a][1,3,5]triazin-7-amine by IUPAC nomenclature, provide its molecular formula.
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C31H31F4N9O
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