You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-[1-(2-chloro-4-methylphenyl)-2-methylprop-1-enyl]-N-[3-(1-fluoro-1-phosphanylethyl)phenyl]-N-methylethanimidamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27ClFN2P
assistant