You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(3-fluorophenyl)-2-(6-pyrrolidin-1-ylpyridin-3-yl)-6H-pyrrolo[3,4-c]pyrazol-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H18FN5O
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