You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[2-(dimethylamino)-2-(3-methoxyphenyl)ethyl]-3-[4-fluoro-3-(trifluoromethyl)phenyl]urea .
user
C19H21F4N3O2
assistant