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(a) Definition of torsion angles α, β1-β3, γ1-γ3, δ, and ζ. Example structures of calculated, ΔΔG-based, lowest-energy conformers of esters (b) 1; (c) 6; (d) 14; and (e) 15 and the (f) C2-symmetrical conformer no. 3 of 22. Dashed lines indicate possible attractive interactions. Distances are in Angstroms.
