You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[1-(1-benzofuran-2-yl)ethyl]-2-(3-cyano-4,5,6-trimethylpyridin-2-yl)sulfanylacetamide ?
user
C21H21N3O2S
assistant