http://www.w3.org/ns/prov#value | - X??? is alkyl or alkoxyalkylalkyl; X is H, alkyl, alkynyl, allyl, Cl, Br, I, F, S, O, NHCOCH(CH3)2, NHCOCH3, NHCOPh, SPh3, OCOCH3 or OCOPh. E is a linker arm between R and Z, and is formed of one to ten moieties, each moiety being selected from a group consisting of phenylene, alkylene containing 1-12 carbon atoms, ethynediyl (???C???C???), ether (???O???), thioether (???S???), amide (???CO???NH??
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