You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-[[2-(2,3-dimethylanilino)-2-oxoethyl]amino]-2-oxoethyl] 5-ethyl-4-methylthiophene-2-carboxylate into its molecular formula.
user
C20H24N2O4S
assistant