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Tetraethylammonium Chloride Tetrabutylammonium bromide Tetrapropylammonium bromide Benzyltriethylammonium chloride Tetraethylammonium hydroxide 4,4'-Bis(diethylamino) benzophenone Tetrabutylphosphonium bromide Tetraethylene glycol dimethyl ether Tetraethylammonium tetrafluoroborate Tetrabutylammonium azide