You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[2-(3-cyclopropyl-6-oxopyridazin-1-yl)ethyl]-2,4-dioxo-3-phenyl-1H-pyrimidine-6-carboxamide ?
user
C20H19N5O4
assistant