3-Pyrrolidinesulfonic acid, 1-(3-((2-((4-azido-2-hydroxybenzoyl)amino)ethyl)dithio)-1-oxopropoxy)-2,5-dioxo- 98897-08-6 SASDP Sulfosuccinimidyl 2-(4-azidosalicylamido)ethyl-1,3'-dithiopropionate