N-(p-chlorosulphonyl)phenylmalemide, EINECS 253-265-1, N-p-chloro-sulfonylfenylmaleimide, N-[4-(chlorosulfonyl)phenyl]maleimide, 4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)benzenesulfonyl chloride, 4-(2,5-Dihydro-2,5-dioxo-1H-pyrrol-1-yl)benzenesulfonyl chloride, 4-(N-maleimidyl)benzenesulfonyl chloride, N-(p-chlorosulfonylphenyl)maleimide, N-(p-chlorosulphonyl)phenylmaleimide