| http://www.w3.org/ns/prov#value | - Examples of alkali catalysts may include bases such as ammonia, sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, triethylamine, triethanolamine, benzyldiethylamine, tetraethylammonium hydroxide, choline hydroxide, and tetrabutylammonium hydroxide, and examples of a quaternary ammonium catalyst may include benzyltriethylammonium chloride and benzyltriethylammonium bromide
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