| http://www.w3.org/ns/prov#value | - N-methyl acrylamide, acrylonitrile and methacrylonitrile, aromatic vinyl compounds, such as styrene and vinyl napthalene and olefinically unsaturated hydrocarbons such as ethylene-bicyclo[2,2,2]-hept-2-ene and bicyclo-[2,2,1]hepta-2,5-diene.
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