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 1-[4-chloro-6-[(4-methoxyphenyl)methylamino]-2-(5-methylfuran-2-yl)pyrimidin-5-yl]propan-2-one ?
user
C20H20ClN3O3
assistant