| http://www.w3.org/ns/prov#value | - The saturated hydrocarbon group having 1 to 10 carbon atoms, represented by R in the formula (1), may be, for example, selected from chain and cyclic alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, cyclopentyl and cyclohexyl.
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