1H-Pyrrole-2,5-dione, 1-((4-(((2,5-dioxo-1-pyrrolidinyl)oxy)carbonyl)cyclohexyl)methyl)- 64987-85-5 N-(4-Carboxycyclohexylmethyl)maleimide N-hydroxysuccinimide ester N-Hydroxysuccinimidyl 4-(N-maleimidomethylcyclohexane)-1-carboxylate N-Smc-carboxylate N-Succinimidyl-4-(N-maleimidomethyl)cyclohexane-1-carboxylic acid SMCC