| http://www.w3.org/ns/prov#value | - substituted by alkyl of up to 20 carbon atoms; a group of the formula --X--(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.g R or of the formulae ##STR8## wherein X is oxygen or a bond when X is not bound to an oxygen, or X is a bond when it is bound to an
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