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 [(2S)-1-(3-acetylanilino)-1-oxopropan-2-yl] 4-methyl-2-pyridin-2-yl-1,3-thiazole-5-carboxylate .
user
C21H19N3O4S
assistant