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-amino-1-cyclopropyl-6-fluoro-7-[6-hydroxy-6-(hydroxymethyl)-1,3,5,6a-tetrahydrocyclopenta[c]pyrrol-2-yl]-8-methoxyquinazoline-2,4-dione by IUPAC nomenclature, provide its molecular formula.
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C20H23FN4O5
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