1-(N-(2-Hydroxy-5-azidobenzoyl)-2-aminoethyl)-4-(N-hydroxysuccinimidyl)succinate 131483-43-7 Butanoic acid, 4-((2,5-dioxo-1-pyrrolidinyl)oxy)-4-oxo-, 2-((5-azido-2-hydroxy-3-(iodo-125I)benzoyl)amino)ethyl ester HAHS