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Conformers with the strongest Ar-Bb interactions. (a) conformer 5 of FGG, (b) conformer 1 of WGG, (c) conformer 7 of YGG; H-bonds are shown as yellow dashed tubes. (d) the superimposition of conformers depicted in (a) — green, (b) — green and (c) — red; the backbones are represented as ribbons. Aliphatic hydrogens are not shown.
