| http://www.w3.org/ns/prov#value | - yl, and alkylaryl, all optionally substituted; or together with Y forms a cyclic group including aryl, cyclic alkyl, and heterocyclic;Y is selected from the group consisting of --H, alkyl, alkenyl, alkynyl, aryl, alicyclic, aralkyl, aryloxyalkyl, alkoxyalkyl, --C(O)R.sup.3, --S(O).sub.2 R.sup.3, --C(O)--OR.sup.3, --CONHR.sup.3, --NR.sup.2.sub.2, and --OR.sup.3, all except H areoptionally substitut
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