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-[5-[(2,2-dimethylpropanoylamino)methyl]thiophen-2-yl]-2-oxoethyl] 2-[(1R,2S,4R)-2-bicyclo[2.2.1]heptanyl]acetate .
user
C21H29NO4S
assistant