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 6-cyclopropyl-2-[2-[4-(5-methylpyrimidin-4-yl)piperazin-1-yl]-2-oxoethyl]pyridazin-3-one ?
user
C18H22N6O2
assistant