You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (4S)-5-[2-(difluoromethyl)-4-(6-methylpyrimidin-4-yl)phenoxy]-2,4-dimethylpentan-2-amine into molecular formula.
user
C19H25F2N3O
assistant