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 1-[2-[4-[2-(cyclobutylamino)-5-nitrobenzoyl]piperazin-1-yl]-3-fluorophenyl]ethanone is given. What is its corresponding molecular formula?
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C23H25FN4O4
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