Skip to main content
. Author manuscript; available in PMC: 2019 Jun 13.
Published in final edited form as: Org Biomol Chem. 2017 Feb 7;15(6):1346–1349. doi: 10.1039/c7ob00063d

Figure 1:

Figure 1:

Sulfonated molecules cannot cross the cellular membrane. Protection with a reductively-labile sulfonate ester allows the molecule to cross the membrane and be unmasked by intracellular glutathione (GSH).