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-ethyl-N,N-dimethyl-2-[[4-(2-methylpropylcarbamoyl)piperazin-1-yl]methyl]benzimidazole-5-carboxamide into molecular formula.
user
C22H34N6O2
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