You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-[6-[4-(4-cyanophenyl)-3-oxo-1H-pyrazol-2-yl]pyridin-3-yl]piperazine-1-carboxamide using the IUPAC nomenclature.
user
C20H19N7O2
assistant