| http://www.w3.org/ns/prov#value | - ethylidene, isopropylidene, neopentylidene, cyclohexylidene, cyclopentadecylidene, cyclododecylidene, and adamantylidene. The bridging radical Y.sup.1 may be a hydrocarbon group or a saturated hydrocarbon group such as methylene, cyclohexylidene, or
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