You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-[4-(1,3-dimethyl-2,6-dioxo-7H-purin-8-yl)piperazin-1-yl]ethyl 3,5-dimethoxybenzoate into molecular formula.
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C22H28N6O6
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