| http://www.w3.org/ns/prov#value | - C1 -C8 straight or branched alkyl substituents, the total carbon atom content of all such optional alkyl substituents being from 1 to 10;R2 is phenyl optionally bearing 1 to 3 C1 -C4 straight or branched alkyl substituents; C3 -C8 branched alkyl; C3 -C8 branched alkenyl; (C3 -C8 cycloalkyl)Cp H2p - wherein p is an integer from 0 to 4, and wherein the 3- to 8-membered ring portion may optionally be
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