You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[3-[1-[2-(dimethylamino)ethyl]-4,5,6,7-tetrahydropyrazolo[4,3-c]pyridin-3-yl]phenyl]acetamide into molecular formula.
user
C18H25N5O
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