| http://www.w3.org/ns/prov#value | - ???Alkene??? refers to straight, branched chain, or cyclic hydrocarbyl groups including from 2 to about 20 carbon atoms having one or more carbon to carbon double bonds, such as 1 to 3, 1 to 2, or at least one carbon to carbon double bond. ???Substituted alkene??? refers to alkene substituted at 1 or more, e.g., 1, 2, 3, 4, 5, or even 6 positions, which substituents are attached at any available a
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