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Institute
Quinone methide precursors protected with alkyldithiomethyl groups have been synthesized and converted into PNA conjugates. Stable in the absence of reducing agents, the electrophilic quinone methide is released by glutathione in concentrations typical for the cytosol. Self-alkylation then occurs or crosslinking of RNA when hybridized with complementary strands. Fastest reactions are seen for the sterically least hindered compound.