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 methyl 6-[[N-ethyl-N'-[(2-oxo-3,4-dihydro-1H-quinolin-4-yl)methyl]carbamimidoyl]amino]hexanoate into molecular formula.
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C20H30N4O3
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