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-[[1-[2-(4-fluorophenoxy)acetyl]piperidin-4-yl]methyl]-6,7-dihydro-5H-cyclopenta[c]pyridazin-3-one is given. What is its corresponding molecular formula?
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C21H24FN3O3
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