You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-butanoyl-2-[1-[(2,4-difluorophenyl)methyl]piperidin-4-yl]-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one into its molecular formula.
user
C23H28F2N4O2
assistant