| http://www.w3.org/ns/prov#value | - wherein R1 is a solubilizing group selected from the group consisting of ethylene glycol oligomers, ethylene glycol polymers, co-ammonium alkyl salts, ??-ammonium alkoxy salts, ??-ammonium oligoether salts, ??-sulfonate alkyl salts, ??-sulfonate alkoxy salts, and ??-sulfonate oligoether salts, and wherein R2 is a solubilizing group selected from the group consisting of ethylene glycol oligomers, e
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