You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,4R)-1-(ethylcarbamothioyl)-4-(3-fluorophenyl)-N-(3-methylbutyl)pyrrolidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H28FN3OS
assistant