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-[1-(4-methoxycarbonylphenyl)-2,5-dimethylpyrrol-3-yl]-2-oxoethyl] 5-bromofuran-2-carboxylate .
user
C21H18BrNO6
assistant