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 4-[[3-[4-(aminomethyl)-4-methylpiperidin-1-yl]-5H-pyrrolo[3,4-b]pyrazin-7-yl]oxy]-3-chloropyridin-2-amine is given. What is its corresponding molecular formula?
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C18H22ClN7O
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