| http://www.w3.org/ns/prov#value | - Examples of organic complexing agents include dithiooxamide and its derivatives such as N,N'-di-benzyldithiooxamide, N,N'-bis(2-octanlyloxyethyl) dithiooxamide, and di-dodecyl dithiooxamide; aromatic substituted hydrazones such as those disclosed in U.S. Pat. No. 4,334,015 or the like.
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