| http://www.w3.org/ns/prov#value | - R1 is in each occurrence independently selected from ???H; linear or branched alkyl with up to 10 carbon atoms; cycloalkyl with up to 10 carbon atoms; benzyl; aryl; or (CH2)xCN, wherein x is an integer from 0 to 6; E is CH or N; n is an integer from 0 to 3; X1 is selected from ???H, m-F, m-Cl, m-Br, m-I, m-CN, m-NO2, m-SO2R1, m-SO2OR1, m-NC(O)R1, or o-F, or X1 and X2 together is a fused benzene, p
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