Chlorosulfonyl isocyanate1189-71-5100 % similar 4-Chlorobenzenesulfonyl isocyanate5769-15-334 % similar Benzenesulfonyl isocyanate2845-62-733 % similar 2-Chlorobenzenesulfonyl isocyanate64900-65-832 % similar Methyl isocyanate624-83-932 % similar p-Toluenesulfonyl isocyanate4083-64-130 % similar