You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(4-ethoxyphenyl)-1-[3-(1,2,3,6-tetrahydropyridin-4-yl)pyrrolo[3,2-b]pyridin-1-yl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25N3O2
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