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Mixtures of dipeptide monomers create stereochemically and constitutionally complex dynamic libraries of potential receptors. When (−)-cytidine was utilized as guest an 84-membered cyclic host was amplified (70–175 fold) from a nearly undetectable initial concentration. Only the specified diastereomeric combination of the two chiral building blocks yielded a dynamic library from which the macrocyclic receptor could be amplified.
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Chung et al. (2011) studied this question.
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