You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-cyclopropyl-2,4-dioxo-N-(1-oxo-3,4-dihydro-2H-isoquinolin-5-yl)pyrido[2,3-d]pyrimidine-6-carboxamide .
user
C20H17N5O4
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