| http://www.w3.org/ns/prov#value | - , such as Cl, Br or especially I), ???S(C1-C4 alkyl), a 5- or 6-membered heterocyclic ring, such as, in particular, indole or imidazole, ???NH???C(NH)???NH2, phenoxyphenyl (unsubstituted or substituted by, for example, ???OH or halogen, such as Cl, Br or especially I), an olefinic group, such as ethylene or vinyl, and CO???NH???C(NH)???NH2.
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