| http://www.w3.org/ns/prov#value | - ydrogen, cyanoamino, carboxyl, cyano, thiocarbamoyl, aminomethyl, quanidino, hydroxy, methanesulfonamido, nitro, amino, methanesulfonyloxy, carboxymethoxy, formyl, methoxy and a substituted or unsubstituted 5- or 6-membered heterocyclic ring containing carbon and one or more nitrogen, sulfur or oxygen atoms, specific examples of such heterocyclic rings being pyrrol-1-yl, 2-carboxypyrrol-1-yl, imid
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