You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 4-(2-ethylpyrrolidin-1-yl)sulfonyl-3,5-dimethyl-1H-pyrrole-2-carboxylic acid using the IUPAC nomenclature.
user
C13H20N2O4S
assistant