| http://www.w3.org/ns/prov#value | - ions cited above, and that of the betaine of the formula VI in European Patent EP 64740 (U.S. Pat. No. 5,071,979).According to process 1, a water-soluble salt of the carboxylic acid II, III, IV or V, for example a sodium, potassium or magnesium salt, is added to a solution of one of these salts I in water, the underlying anion forming a poorly water-solubleacid addition salt of the formula I. Thes
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