| http://www.w3.org/ns/prov#value | - of the formula: -L.sup.3-R.sup.10, wherein R.sup.10 is hydroxyalkyl, carboxy, alkyloxycarbonyl, optionally substituted carbamoyl or a carboxy equivalent, and L.sup.3 is a single bond, optionally substituted alkylene optionally containing one or two
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