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-[[5-chloro-2-[[2-[(4-methylpiperazin-1-yl)methyl]-3H-benzimidazol-5-yl]amino]pyrimidin-4-yl]amino]-N,N-dimethylbenzamide is given. What is its corresponding molecular formula?
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C26H30ClN9O
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