You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule N-[2-(2,6-dimethylanilino)-2-oxoethyl]-N,4-dimethyl-6-methylsulfanyl-2-propan-2-ylpyrimidine-5-carboxamide ?
user
C21H28N4O2S
assistant