p-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)benzenesulphonyl chloride

4-[(2,5-Dihydro-2,5-dioxo-1H-pyrrol)-1-yl]benzenesulfonyl chloride

4-(2,5-Dihydro-2,5-dioxo-1H-pyrrole-1-yl)benzene-1-sulfonic acid chloride