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-[[4-[2-(benzylamino)-4-methyl-7-oxopyrido[2,3-d]pyrimidin-8-yl]benzoyl]amino]-N,N-dimethylpropan-1-amine oxide by IUPAC nomenclature, provide its molecular formula.
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C27H30N6O3
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