You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-acetyl-3-[2-(2-imidazol-1-ylethyl)piperidine-1-carbonyl]-6-methyl-1H-pyridin-2-one by IUPAC nomenclature, provide its molecular formula.
user
C19H24N4O3
assistant