| http://www.w3.org/ns/prov#value | - re in polar solvents such as ethanol or dimethylformamide); and isocyanates derivable from acetate esters of mono- and poly-hydroxamic acids or from dihydroxamic acids and their metal salts (the processes of which are disclosed in U.S. Pat. Nos. 3,465,024 and 2,394,597, respectively).
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