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 4-[(2R)-4-[1-(2-ethylpyridin-3-yl)ethyl]-2-methylpiperazin-1-yl]-6-oxo-1H-pyridazine-5-carbonitrile .
user
C19H24N6O
assistant