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-[(3,4-dimethoxyphenyl)methyl]-1-[[4-(3-oxopiperazine-1-carbonyl)phenyl]methyl]guanidine is given. What is its corresponding molecular formula?
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C22H27N5O4
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