1-(3-(4-Hydroxyphenyl)-1-oxopropoxy)-2,5-dioxo-3-pyrrolidinesulfonic acid 106327-86-0 3-Pyrrolidinesulfonic acid, 1-(3-(4-hydroxyphenyl)-1-oxopropoxy)-2,5-dioxo- Sulfo-shpp Sulfosuccinimidyl-3-(4-hydroxyphenyl)propionate