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(a) α-Helix (left)- and β-turn (right)-like conformations for representative compound 8r; (b) superimposition of 8r conformers with an α-helix model in orange (left), 310-helix model in orange (center), and β-turn in green (right). For the α-helix, the relevant i, i + 4, and i + 7 positions are highlighted.
