| http://www.w3.org/ns/prov#value | - tems may also contain from 1 to 3 heteroatoms, such as S, N and/or O, Hal, OH, NO2, ???(CR5R6)n???NR5R6, ???(CR5R6)n???N???CR5R6, ???(CR5R6)n???CR5???NR5, ???(CR5R6)n???NHCOR5, ???(CR5R6)n???NHCOOR5, ???SR5, ???SO2???R5, NR5???SO???R6 or ???SO???R5, water-solubilising substituents selected from the group consisting of carboxylate, sulfonate or ammonium radicals, COR5, COOR5, CONR5R6, CN, O???S(???
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