You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-(2,3-dichlorophenyl)-3-piperidin-4-yl-5H-pyrrolo[3,4-d]pyrimidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H16Cl2N4O
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