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 2-[2-[(3S,4S)-3-(dimethylamino)-4-methylpyrrolidin-1-yl]-2-oxoethyl]-4-methylphthalazin-1-one .
user
C18H24N4O2
assistant