You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[(7-chloro-1-oxo-2H-isoquinolin-6-yl)oxy]piperidin-1-yl]-N-propylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H24ClN3O3
assistant