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Model of 8 binding glucosammonium 13⋅H+, featuring salt-bridge formation by side chains on both sides of the receptor. Anthracene units are shown in the space-filling mode. Substrate atoms are pink, side-chain atoms are pale green, and hydrogen bonds to terminal carboxylate groups are cyan. The structure was minimized without constraints by the use of MacroModel 10.3 (MMFFs force field, aqueous GB/SA solvation).
