You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-(4-fluorophenyl)-5-imino-4-[6-(4-methylpiperazin-1-yl)-1H-benzimidazol-2-yl]-2H-pyrrol-3-ol into molecular formula.
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C22H23FN6O
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