| http://www.w3.org/ns/prov#value | - he group consisting of sulfonic, carboxyl, phosphono, sulfamoyl, carbamoyl, hydroxyl, alkoxy, amino, alkylamino, dialkylamino, arylamino, diarylamino, acetylamino, ureido, alkyl, nitro, cyano, alkylsulfonyl and alkylthio groups and halogen atoms, Y is a hydroxyl group or amino group, and l, m and n have the following relationship: 0???l???2, 0???m???3, 0.1???n???3 and l+m+n=1 to 4.
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