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-[2-(3,4-dimethoxyphenyl)-1,3-thiazol-4-yl]-N-[4-(oxolan-2-yl)butan-2-yl]acetamide .
user
C21H28N2O4S
assistant