| http://www.w3.org/ns/prov#value | - Particularly suitable acid acceptors are the alkaline earth metal and alkali metal carbonates, especially potassium carbonate and sodium carbonate and the tertiary amines l,5-diazabicyclo[4.3.0]non-5-ene and 1,8- diazabicyclo[5.4.0]undec-7-ene.
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