| http://www.w3.org/ns/prov#value | - wherein D1 and D2 each represents a condensed polycyclic aromatic heterocyclic moiety or an aromatic heterocyclic ring ring-substituted amino group, which may contain an --SO3 M group, wherein M is a hydrogen atom, an alkali metal or ammonium group, provided that the --A-- moiety should contain an --SO3 M group when no --SO3 M group is contained in either D1 or D2 described above.
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