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Chemical structures of the 6-AQ derivatives considered in this study. Compounds were synthesized as previously described (4, 18). WM5, WT5, and WC5 correspond to compounds 12a, 7a, and 8a, respectively, reported in reference 4, while WC13 is compound 28d reported in reference 18. Me, methyl; t-Bu, tert-butyl; c-Pr, cyclopropyl.
