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 N-[2-[(8-methyl-4-oxopyrido[1,2-a]pyrimidin-2-yl)methylsulfanyl]phenyl]-2-(4-methylphenoxy)acetamide ?
user
C25H23N3O3S
assistant