| http://www.w3.org/ns/prov#value | - By alkenyl is meant straight or branched chain alkenyl groups of 2 to 20 carbons such as 1-propenyl, 2-propenyl or allyl, 1-butenyl, 2-butenyl, 1-pentenyl, and the corresponding positional isomers such as 1-isobutenyl, 2-isobutenyl, 2-sec-butenyl, 2-methyl-1-butenyl, 2-methyl-2-pentyenyl and 2,3-dimethyl-3-hexenyl.
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