| http://www.w3.org/ns/prov#value | - Z and L may be bonded to each other to form a five- or six-membered ring. [0210] Examples of the alkyl groups represented by L and Z in formula (IV) include linear, branched, or cyclic ones having 1 to 20 carbon atoms, such as methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, pentyl group, cyclopentyl group, hexyl group, cyclohexyl group, octyl
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