You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-[2-hydroxyethyl(methyl)amino]-1,3-dimethylpyrazolo[3,4-b]pyridine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H20N4O3
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