| http://www.w3.org/ns/prov#value | - R9 represents hydrogen, halogen, such as fluorine or chlorine, methyl or nitro, or alternatively, together with R1, can form a bridge of the structure ##STR5## in dissolved form with no more than 1 to 10 ppm, preferably 1 to 5 ppm, relative to the major active compound component of the solution, of secondary components.
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