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-(methoxymethyl)-2-methyl-5-oxo-4-(2,4,6-trimethylphenyl)-1H-pyrrol-3-yl] 2,2-dimethylpropanoate .
user
C21H29NO4
assistant