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 [4-[4-[(2,4-dichlorophenyl)methylamino]pyrido[2,3-d]pyrimidin-2-yl]piperazin-1-yl]-(2-ethylpiperidin-2-yl)methanone is given. What is its corresponding molecular formula?
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C26H31Cl2N7O
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