| http://www.w3.org/ns/prov#value | - pparent to one of ordinary skill in the art, that the carboxylic acid moiety of the above-listed compounds may be substituted for a wide variety of charged or polar groups, including but not limited to, hydroxides, polyethers, such as polyethylene glycol and the like, and amines, as well as charged groups, such as carboxylates, sulfonates, phosphates, nitrates, ammonium salts and the like.
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