You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-butyl-4-[2-oxo-1-phenyl-2-(5,6,7,9-tetrahydroimidazo[1,5-a][1,4]diazepin-8-yl)ethyl]piperazine-2,3-dione by IUPAC nomenclature, provide its molecular formula.
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C23H29N5O3
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