You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-[4-(6-oxo-4-thiophen-3-yl-1H-pyrimidin-2-yl)piperidine-1-carbonyl]phenyl]acetamide into its molecular formula.
user
C22H22N4O3S
assistant