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 7-(diethylamino)-3-[3-[6-[6-[3-[7-(diethylamino)-2-oxochromen-3-yl]phenyl]pyridin-2-yl]pyridin-2-yl]phenyl]chromen-2-one is given. What is its corresponding molecular formula?
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C48H42N4O4
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