| http://www.w3.org/ns/prov#value | - esters such as vinyl acetate, vinyl chloroacetate, vinyl butylate, vinyl benzoate and the like (m7) styrenes such as styrene, ??-methylstyrene, methylstyrene, chloromethylstyrene and the like (m8) vinyl ketones such as methyl vinyl ketone, ethyl vinyl ketone, propyl vinyl ketone, phenyl vinyl ketone and the like (m9) olefins such as ethylene, propylene, isobutylene, butadiene, isoprene and the li
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