You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-[3-[4-(4-chloro-2-methylphenyl)piperidin-1-yl]-3-oxopropyl]-2-hydroxy-5-methylimidazolidin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C19H26ClN3O3
assistant