You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(benzimidazol-1-yl)-1-[4-[2-(cyclohexylamino)-6-methylpyrimidin-4-yl]piperazin-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H31N7O
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