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-[methyl-[2-(4-methylanilino)-2-oxoethyl]amino]-N-[2-oxo-2-(2,3,4-trifluoroanilino)ethyl]propanamide .
user
C21H23F3N4O3
assistant