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Differential validation in the GOLD package by docking the native ligands of AChE into their binding sites: (a) The native co-crystallized tacrine represented by green sticks; docked ligands are shown in the form of balls and sticks, colored by element. Putative binding modes of: (b) compound 2c; (c) compound 2m; (d) compound 2g; (e) compound 2j; and (f) compound 2f.
