You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 8-[3-[2-chloro-3-[6-ethoxy-5-[[(5-oxopyrrolidin-2-yl)methylamino]methyl]pyridin-2-yl]phenyl]-2-methylphenyl]-3-[[(5-oxopyrrolidin-2-yl)methylamino]methyl]pyrido[1,2-a]pyrimidin-4-one ?
user
C40H42ClN7O4
assistant