You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[[3-(5-methylpyridin-3-yl)-1H-pyrrolo[2,3-b]pyridin-5-yl]methoxy]ethyl]morpholine is the IUPAC name of a molecule. Please give its molecular formula.
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C20H24N4O2
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