You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[3-[2-(dimethylamino)ethylamino]-3-oxopropyl]-5-methyl-N-(oxolan-2-ylmethyl)pyrazine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C18H29N5O3
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