| http://www.w3.org/ns/prov#value | - As substituents X there are to considered inter alia: optionally substituted alkyl, aralky-l and aryl radicals, sulfonic acid, carboxylic acid, halogen substituents, such as chlorine and bromine substituents, funther nitro, hydroxy, alkoxy, cyano, sul fone and optionally substituted sulfonamide groups, acid ester groupings such as sulfonic acid and carboxylic acid ester groups and the like.
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