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 2-[5-[(3-chlorophenyl)methyl]-1,4-dimethyl-6-oxopyrimidin-2-yl]sulfanyl-N-(furan-2-ylmethyl)propanamide ?
user
C21H22ClN3O3S
assistant