You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-(2-oxo-3,4-dihydro-1H-quinolin-6-yl)ethyl] 1,3-dimethylpyrazolo[3,4-b]pyridine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H18N4O4
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