You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[2-(2,5-dimethyl-1H-pyrrol-3-yl)-2-oxoethyl]-N-(4-methylphenyl)sulfonylpiperazine-1-carboxamide .
user
C20H26N4O4S
assistant