| http://www.w3.org/ns/prov#value | - s, as well as those substituted groups obtained by replacing a part or all of the hydrogen atoms in the above named hydrocarbon groups with substituent atoms and/or groups such as halogen atoms, cyano groups and the like, e.g. chloromethyl, 3,3,3-trifluoropropyl, 2-cyanoethyl and 3-cyanopropyl groups, and the subscript a is a number in the range from 1.90 to 2.05.
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