| http://www.w3.org/ns/prov#value | - r with --C(H).sub.pC(.dbd.X)--, of the formula:##STR00018## wherein p is zero or one, T is selected from the group consisting of alkylene, substituted alkylene, alkenylene, substituted alkenylene, --(R.sup.21Z).sub.qR.sub.21-- and --ZR.sup.21-- where Z is a substituent selected from thegroup consisting of --O--, --S-- and >NR.sup.20, each R.sup.20 is independently selected from the group consistin
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