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-[(3,5-diethyl-1,2-oxazol-4-yl)methyl]-1-ethyl-3-[(1-methylbenzimidazol-2-yl)methyl]guanidine is given. What is its corresponding molecular formula?
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C20H28N6O
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