You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)propyl]-6-fluoro-3,4-dihydroisoquinolin-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H27FN2O3
assistant