You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-(3-aminopropyl)-3-(3-chloro-4-fluorophenyl)-1-[1-(1-oxo-2H-isoquinolin-4-yl)ethyl]urea ?
user
C21H22ClFN4O2
assistant