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-amino-5,6-bis(4-fluorophenyl)-3,7-dihydropyrrolo[2,3-d]pyrimidin-4-one is given. What is its corresponding molecular formula?
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C18H12F2N4O
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