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 2,5-difluoro-N-[1-[7-[(4-phenylphenyl)methyl]-5,6,8,9-tetrahydro-[1,2,4]triazolo[4,3-d][1,4]diazepin-3-yl]ethyl]benzamide is given. What is its corresponding molecular formula?
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C28H27F2N5O
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