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 2,6-difluoro-N-[3-methyl-1-[methyl-[(3-methylthiophen-2-yl)methyl]amino]-1-oxobutan-2-yl]benzamide .
user
C19H22F2N2O2S
assistant