| http://www.w3.org/ns/prov#value | - to in which E represents a divalent organic radical posabout 2, R represents a divalent hydrocarbon radical sessing from 2 to carbon atoms, for example a linear with l to 8 carbon atoms, which is derived from an alor branched alkylene radical with less than 13 carbon dehyde or a ketone of the general'formula: atoms, a phenylene radical, a cyclohexylene radical or R one of the radicals of the formu
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