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-[4-(imidazo[1,2-a]pyridin-2-ylmethyl)piperazin-1-yl]-N-(2-methoxyethyl)propanamide is given. What is its corresponding molecular formula?
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C18H27N5O2
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