102260-45-7 3-Oxazolidinyloxy, 2,2-bis(3-((2,5-dioxo-3-sulfo-1-pyrrolidinyl)oxy)-3-oxopropyl)-4,4-dimethyl- BSSDP Bis(sulfo-N-succinimidyl)doxyl-2-spiro-4'-pimelate