You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [2-[(3-cyano-6-methyl-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)amino]-2-oxoethyl] 2,4-difluorobenzoate .
user
C19H16F2N2O3S
assistant